On Wed Jul 29 05:29:30 2026 Roger Merriman wrote:
cyclintom <cyclintom@yahoo.com> wrote:
On Sun Jul 26 22:32:34 2026 Roger Merriman wrote:
cyclintom <cyclintom@yahoo.com> wrote:
On Fri Jul 24 21:13:37 2026 Roger Merriman wrote:Since you post to Strava, I?m using the strava average speeds which
cyclintom <cyclintom@yahoo.com> wrote:
On Thu Jul 23 14:29:16 2026 AMuzi wrote:
On 7/23/2026 2:18 PM, cyclintom wrote:
On Tue Jul 21 15:56:58 2026 AMuzi wrote:
On 7/21/2026 3:34 PM, cyclintom wrote:
On Tue Jul 21 07:57:33 2026 AMuzi wrote:
On 7/21/2026 12:40 AM, Jeff Liebermann wrote:
On Mon, 20 Jul 2026 19:02:38 -0400, zen cycle
<funkmasterxx@hotmail.com> wrote:
Tommy seems to think accuracy is affected by battery voltage. As usual,
he's wrong. You however are correct, when the the power level gets below
a certain point, it just stops working. Accuracy is unaffected before
that. Anyone who has done any electronic design work in the past 30
years knows this.
"Edge 1030. Lack of low battery warning"
<https://forums.garmin.com/sports-fitness/sports-fitness/f/edge-1030/214372/lack-of-low-battery-warning>
"To receive this notification about entering battery save mode when
battery goes below 10% you have to activate:
System -> Widget Management -> Notifications
When Notifications widget is active - you receive it. With >>>>>>>>>>>>> Notifications deactivated you won't receive it"
The battery in a Edge 1030+ uses LIPO (lithium polymer) chemistry. It
has a fairly flat (constant voltage) discharge curve. By the time the
voltage drops to 10% capacity, the discharge curve is in rapid >>>>>>>>>>>>> descent, which limits the amount of time a warning icon or message
might be seen before the device turns off.
Andrew, you are continually falling into the trap that idiot >>>>>>>>>>> Liebermann knows something. As I explained to Zen, a failing battery
on the power meter greatly effects the reading of power, and calories
on the calculations. I have had all I could take from that stupid >>>>>>>>>>> fool and have blocked him. I suggest you do the same. The very fact >>>>>>>>>>> that he could never get an engineering job in an area with the >>>>>>>>>>> hottest EE demands in the entire world should have told you something
about him. Taking his word for anything is just asking to be made a fool of.
Nothing I wrote appears above.
But you did post "The problem may well lie in fantasy and self delusion rather
than electricity, electronics or software" in commenting on my posting.
Exactly how do you FAKE Garmin readings? The ONLY variable available to
the user is weight. So exactly where does this fantasy come in? Is it >>>>>>>>> fantasy to be riding 13 mph into a 10 mph headwind and 17 mph downwind
to claim and average traveling speed of 14 mph? I was in real bad shape
today with little sleep last night and my average heart rate was 117 >>>>>>>>> bpm and 120 or avove for most of the ride and I still made a 10.2 >>>>>>>>> average and rode at 12 and 13 mph the whole way. Note that 10.2 mph number hardly
Yes, I did write that. It just wasn't quoted above your comment. >>>>>>>>
And none of your conclusions about expended power agree with
anyone else's experience, anywhere, ever.
Andrew, I'm trying to understand your position. The Garmin gives me the >>>>>>> numbers I quoted, Wolfgang's calculator agrees with them and you're >>>>>>> saying that this is all fantasy? Deacon Mark shoes numbers about half the
size on a trainer and you think it fantasy to double them on real road >>>>>>> into real headwinds? Power Meters are a simple device which is nothing >>>>>>> more than a pair of resisters. One of them fixed and the other one >>>>>>> variable. (a volume control if you will.) The electronics does nothing >>>>>>> more than scale the readings of the resisters in series. So of course, >>>>>>> since it is an analog device it is sensitive to the voltage across the >>>>>>> pair. It is possible to build a voltage regulator to supply the voltage >>>>>>> but coin cell voltage is so low to start with the regulator would eat >>>>>>> more power than the power meter probably making battery life a quarter of
what it is. So they simply put a battery voltage level warning in the Garmin.
No Wolfgang?s calculator he linked to did not agree with you as with all >>>>>> the others at 215 or thereabouts and 11mph average that?s 50/60 watts. >>>>>>
Garmin and I?m sure all of the others cycling computers pass on low battery
warnings from sensors be that heart rate/powermeters/lights or so on. >>>>>>
And absolutely no ones powermeters drops the amount as the batteries drain,
as folks have been kind enough to explain why, likewise DC rainmaker is >>>>>> very in-depth reviews and would absolutely note if your powermeters did >>>>>> that!
Remember when I said I was interviewed by Tesla and claimed that the >>>>>>> engineer hung up on me when I said that they shouldn't call it a "self >>>>>>> driving feature"? Elon Musk has now admitted that I was correct.
Why claim things you know folks will not believe? Musk has rather trashed
his reputation, and companies connected to him. He at one point was viewed
as a real life Iron man now not so much!
Again this isn?t making you look good ie no one believes it to be true, and
If you think that Zen knows anything beyond his own job and that his >>>>>>> comments have the slightest veracity concerning voltage levels, you are >>>>>>> wrong.I became an engineer by knowing more than supposed engineers and >>>>>>> convinced some of the best that I knew more than they on many points. >>>>>>> That isn't bragging, it's just simple fact. Zen is in a quality control >>>>>>> position and he knows quality control. Donj't expect him to know >>>>>>> engineering. If Liebermann knew anything he could have gotten a job. I >>>>>>> deleted 8 job offers from my email this morning and my resume is marked >>>>>>> "retired". So they just keep offering me more money.
just make you look foolish.
Stop using 11 mph since thst is a false reading. Average speed should be >>>>> the speed you ride at and NOT correctred for slowing down for stop signs >>>>> etc. This morning I was riding 12 mph almost directly into a 20 mph
headwind. I did this for most of the first 17 miles. The second half (13 >>>>> miles) the wind had clocked around to full on the beam and I was riding >>>>> 15 mph in a 20 mph crosswind does that sound like 11 mph?
You saod you had a Garmin didn't you? What are your calories and average speed?
generally remove stops, I rode today though Richmond Park and over
Hammersmith Bridge and though Chiswick which had a food market though I >>>> didn?t stop and some nice cafes which I did stop at.
Strava average of 12.8 or Garmin 9.2 as I had a reasonable cafe stop, my >>>> Garmin 830 doesn?t auto pause as I don?t want it doing that, for example >>>> pausing on slow technical single track.
On the commute which is fairly low number of stops, it?s 13.2/12.9 for each
platform as I have 3 traffic lights aka stops over the 11 or so miles, >>>> hence the rim brake nature of the roadie commuter isn?t a problem.
Since you probably unintentionally post to Strava can see that the average >>>> speed was 10.4 and most of the segments are around 10mph some 7mph some >>>> 11/12 mph.
It?s a bit silly to claim otherwise!
https://mywindsock.com/ can calculate the amount of watts extra for wind, >>>> which shows how much watts you?d need for a give weather forecast and more >>>> importantly where the headwinds would be.
Roger, I have no idea where you get your wild flights of imagination.
Strava posts the READINGS directly from the Garmon and nothing else!
Try and read this and see if you can understand it:
https://www.cyclistshub.com/average-cycling-power/
Do you have that? UNTRAINED people should be able to hold full time power >>> of 2.6 watts/kg I weigh 210 lbs or 95 kg or 95 x 2,6 = 247 watts.I have
been reporting LESS thaqn that and your imagination tells you that is too much.
Because Tom I do have friends and they are trained ie they do cycle for
fitness and doing the pub loop on Wednesday will average 20mph at generally >> mid to high 100?s
No the Garmin and Strava is just taking what ever the power meter produces >> as data it?s not making any assumptions or adjustments, ie if you?ve
I burned 1300 calories on today's ride. If you are burning less, relative >>> to my weight, you are riding much slower. Stop trying to pretend that you >>> know anything about this. Garmin engineers know a hundred times more than >>> you do and their approximations are far closer to correct than you could ever make.
managed to mess up the installation and it reads incorrectly it both Garmin >> and Strava will not make any assumptions will just display it.
Ie bad data in bad data out!
Let alone none of the power calculations will get anything close to the
power you were claiming.
Roger, if you don't have a power meter why are you imagining how it
should work? Why not simply buy one and see for yourself?
The useable life of the 2032 in my pedals is two weeks. Then it started showing low battery warning and as the power meter started slowly dimenishing to zero you were telling me it was showing too high.
On Thu, 30 Jul 2026 20:28:33 GMT, cyclintom <cyclintom@yahoo.com>
wrote:
The useable life of the 2032 in my pedals is two weeks. Then it started showing low battery warning and as the power meter started slowly dimenishing to zero you were telling me it was showing too high.
Tom: Strava shows that you ride about 9 hrs per week: <https://www.strava.com/athletes/27432450>
In 2 weeks, that's 18 hrs of battery life. You would likely be
complaining about battery consumption (about 26 cells per year) if you trashed a battery every 2 weeks.
I found a comment under this article: <https://www.dcrainmaker.com/2020/05/pedals-testing-accuracy.html>
"Phil W
September 16, 2020 at 1:52 am #177
How is the battery life on your unit? The people who have got some of
the 19 deliveries are reporting only 15 hours (link to facebook.com)."
Methinks 15 hrs battery life is close enough to Tom's "2 weeks" claim
(18 hrs) to make it almost believable.
So, I'm trying to join the IQ2 Power Meter group on Facebook to dig
deeper. It's a private group with 2,500 members: <https://www.facebook.com/groups/310961256945364>
I'm waiting for approval. The "About this group" section suggests: <http://powermeterpedals.com>
for ordering the IQ2 Power Meter pedals. Unfortunately, the server
appears to be dead.
Roger, there certainly is nothing wrong with that. But if you don't have any experience with power meters perhaps you shouldnt criticise their readings.Roger, if you don't have a power meter why are you imagining how it
should work? Why not simply buy one and see for yourself?
Because I have no need or use for a power meter I don?t train, any fitness
is purely a by product of what is a social/leisure activity for me!
And I?m certainly not going to spend reasonable money just because someone
is wrong on the internet!
On 7/31/2026 12:00 AM, Jeff Liebermann wrote:
On Thu, 30 Jul 2026 20:28:33 GMT, cyclintom <cyclintom@yahoo.com>
wrote:
The useable life of the 2032 in my pedals is two weeks. Then it started showing low battery warning and as the power meter started slowly dimenishing to zero you were telling me it was showing too high.
No, tom, the power meter does not "slowly diminish to zero". It will
keep working and report consistent power readings until the battery
power gets too low, then it just stops. There will be no/little
variation in the power readings until then. If your particular unit
shows a "slowly diminish to zero" it's defective and you should send it back
Tom: Strava shows that you ride about 9 hrs per week:
<https://www.strava.com/athletes/27432450>
In 2 weeks, that's 18 hrs of battery life. You would likely be
complaining about battery consumption (about 26 cells per year) if you
trashed a battery every 2 weeks.
I found a comment under this article:
<https://www.dcrainmaker.com/2020/05/pedals-testing-accuracy.html>
"Phil W
September 16, 2020 at 1:52 am #177
How is the battery life on your unit? The people who have got some of
the 19 deliveries are reporting only 15 hours (link to facebook.com)."
Methinks 15 hrs battery life is close enough to Tom's "2 weeks" claim
(18 hrs) to make it almost believable.
So, I'm trying to join the IQ2 Power Meter group on Facebook to dig
deeper. It's a private group with 2,500 members:
<https://www.facebook.com/groups/310961256945364>
I'm waiting for approval. The "About this group" section suggests:
<http://powermeterpedals.com>
for ordering the IQ2 Power Meter pedals. Unfortunately, the server
appears to be dead.
The factory site is alive and well
https://www.iqsquareasia.com/en
but all merchandise says sold out
On Thu Jul 30 22:31:25 2026 Roger Merriman wrote:
Because I have no need or use for a power meter I don?t train, any fitness >> is purely a by product of what is a social/leisure activity for me!
Roger, if you don't have a power meter why are you imagining how it
should work? Why not simply buy one and see for yourself?
And I?m certainly not going to spend reasonable money just because someone >> is wrong on the internet!
Roger, there certainly is nothing wrong with that. But if you don't have
any experience with power meters perhaps you shouldnt criticise their readings.
You have Wolfgang turning around after posting a link to a
powercalculator anddenying his very model and saying he doesn't believe
the Garmin readings even though they agree with his cited modeling
program. That's getting pretty silly just to try and support your imagination. You're better than that.
cyclintom <cyclintom@yahoo.com> wrote:
On Thu Jul 30 22:31:25 2026 Roger Merriman wrote:
Because I have no need or use for a power meter I don?t train, any fitness >>> is purely a by product of what is a social/leisure activity for me!
Roger, if you don't have a power meter why are you imagining how it
should work? Why not simply buy one and see for yourself?
And I?m certainly not going to spend reasonable money just because someone >>> is wrong on the internet!
Roger, there certainly is nothing wrong with that. But if you don't have
any experience with power meters perhaps you shouldnt criticise their readings.
Some of my cycling buddies have them, and note these are faster fitter guys than I am and thus faster again than yourself so IrCOm aware of the power numbers that will for example get one around a short loop at 20 MPH
average. Ie double your average speeds as you average 10/11mph.
You have Wolfgang turning around after posting a link to aWolfgangs power calculator did not agree with you at 214 pounds and 11mph average all power calculations will be around 60 watts. Hence Strava estimates 80 watts for my roadie commute bike as IrCOm generally 12/13mph on that, and clearly is a relatively easy pace as IrCOm riding to work!
powercalculator anddenying his very model and saying he doesn't believe
the Garmin readings even though they agree with his cited modeling
program. That's getting pretty silly just to try and support your
imagination. You're better than that.
Garmin and even Strava do nothing with the power data but display it, ie
bad data in bad data out that all they donrCOt touch it, Strava like others will display a calculation of your power if constant but fundamentally your wild readings have nothing to do with Garmin, this is all on you.
Roger Merriman
On Tue, 21 Jul 2026 20:12:32 GMT, cyclintom <cyclintom@yahoo.com>
wrote:
No it doesn't "shut off" or there would be no need for a low battery warning. As you say, this is tech school stuff and you obviously flunked that. Wiull you please stop pretending to know anything other than your QC position. I keep trying to be kind to you and you con tinue to stick your head up your ass.When you engage a power meter it changes the calculations to include Watts as read by the power meter.
So when the power drops on the power meter batteries and it begins misreading power,
No, tommy, the meter does not misread power as the power source drops.
Power meters have regulated power supplies. The regulator output keeps
the supply voltage to the meter constant until the input to the
regulator drops below a certain point, then the regulator shuts off.
This is tech-school stuff tommy. A real engineer would know better.
it also misreads calories which is ALSO a reading of power consumed.
Which would only be true with erroneous power readings. Since the
accuracy of the power meter does _not_ fluctuate with battery voltage,
the caloric calculation remains just as accurate.
I just deleted the power meter since I'm going to install it on the Eddie Merckz that will be here on Thursday.
That was pretty dumb. The power meter doesn't care what bike it's on.
all you did was to create more work for yourself.
The Colnago w3on't be ready to go until the press in Campy ultratorque fitings get here in August. I will put my Proton wheels on the Colnago and move the Ventos over3 to the Merckx San RemoI will give the Master X Lite a good cleaning and put it up on Ebay.
Please be more specific such as including model numbers? It would
also be nice to know what this has to do with calculating or measuring calories.
Craigslist has become useless.
only as useless as the user.
On 8/1/2026 5:25 AM, Roger Merriman wrote:That is so stupid that it doesn't even merit a comment.
cyclintom <cyclintom@yahoo.com> wrote:
On Thu Jul 30 22:31:25 2026 Roger Merriman wrote:
Because I have no need or use for a power meter I don?t train, any fitness
Roger, if you don't have a power meter why are you imagining how it
should work? Why not simply buy one and see for yourself?
is purely a by product of what is a social/leisure activity for me!
And I?m certainly not going to spend reasonable money just because someone
is wrong on the internet!
Roger, there certainly is nothing wrong with that. But if you don't have >> any experience with power meters perhaps you shouldnt criticise their readings.
You've never ridden a virtual cycling set up, yet you constantly go
about them as if you designed them with statements like "trainers do not
have road friction, aerodynamic drag and wind added into the actual
power necessary to give you a speed" which is completely false.
IT isn't necessary for someone to have used a power meter before they
can comment about the performance if they have an understanding of the science behind it. BTW - Roger isn't criticizing power meters in
general. He's suggesting your numbers are wrong due to your incompetence.
On 7/31/2026 12:00 AM, Jeff Liebermann wrote:
On Thu, 30 Jul 2026 20:28:33 GMT, cyclintom <cyclintom@yahoo.com>
wrote:
The useable life of the 2032 in my pedals is two weeks. Then it started showing low battery warning and as the power meter started slowly dimenishing to zero you were telling me it was showing too high.
No, tom, the power meter does not "slowly diminish to zero". It will
keep working and report consistent power readings until the battery
power gets too low, then it just stops. There will be no/little
variation in the power readings until then. If your particular unit
shows a "slowly diminish to zero" it's defective and you should send it back
Tom: Strava shows that you ride about 9 hrs per week: <https://www.strava.com/athletes/27432450>
In 2 weeks, that's 18 hrs of battery life. You would likely be
complaining about battery consumption (about 26 cells per year) if you trashed a battery every 2 weeks.
I found a comment under this article: <https://www.dcrainmaker.com/2020/05/pedals-testing-accuracy.html>
"Phil W
September 16, 2020 at 1:52 am #177
How is the battery life on your unit? The people who have got some of
the 19 deliveries are reporting only 15 hours (link to facebook.com)."
Methinks 15 hrs battery life is close enough to Tom's "2 weeks" claim
(18 hrs) to make it almost believable.
So, I'm trying to join the IQ2 Power Meter group on Facebook to dig
deeper. It's a private group with 2,500 members: <https://www.facebook.com/groups/310961256945364>
I'm waiting for approval. The "About this group" section suggests: <http://powermeterpedals.com>
for ordering the IQ2 Power Meter pedals. Unfortunately, the server
appears to be dead.
The factory site is alive and wellWhen did you learn to read Chinese? I actually have the manual and contrary to your claims, it does not talk about power other than the coin cell lasts only 40 hours. and yet it contiunues to report power readings after that as the readings slowly fall to zero. When you don't own a set of these pedals why do you continue totalk about them as if you do?
https://www.iqsquareasia.com/en
but all merchandise says sold out
On Thu Jul 23 05:51:07 2026 zen cycle wrote:
On Tue, 21 Jul 2026 20:12:32 GMT, cyclintom <cyclintom@yahoo.com>
wrote:
When you engage a power meter it changes the calculations to include Watts as read by the power meter.
So when the power drops on the power meter batteries and it begins misreading power,
No, tommy, the meter does not misread power as the power source drops.
Power meters have regulated power supplies. The regulator output keeps
the supply voltage to the meter constant until the input to the
regulator drops below a certain point, then the regulator shuts off.
This is tech-school stuff tommy. A real engineer would know better.
it also misreads calories which is ALSO a reading of power consumed.
Which would only be true with erroneous power readings. Since the
accuracy of the power meter does _not_ fluctuate with battery voltage,
the caloric calculation remains just as accurate.
I just deleted the power meter since I'm going to install it on the Eddie Merckz that will be here on Thursday.
That was pretty dumb. The power meter doesn't care what bike it's on.
all you did was to create more work for yourself.
The Colnago w3on't be ready to go until the press in Campy ultratorque fitings get here in August. I will put my Proton wheels on the Colnago and move the Ventos over3 to the Merckx San RemoI will give the Master X Lite a good cleaning and put it up on Ebay.
Please be more specific such as including model numbers? It would
also be nice to know what this has to do with calculating or measuring
calories.
Craigslist has become useless.
only as useless as the user.
No it doesn't "shut off" or there would be no need for a low battery warning. As you say, this is tech school stuff and you obviously flunked that. Wiull you please stop pretending to know anything other than your QC position. I keep trying to be kind to you and you con tinue to stick your head up your ass.
On 7/28/2026 2:24 PM, cyclintom wrote:
On Mon Jul 27 19:58:24 2026 zen cycle wrote:
On 7/26/2026 8:58 PM, Jeff Liebermann wrote:
On Sun, 26 Jul 2026 21:54:08 GMT, cyclintom <cyclintom@yahoo.com>
wrote:
How do you hink that power meters work? There are several ways, but there is not many ways to make them insensitive to voltage and it requires more voltage then is available to a colin cell which only has a volt and a half.
The CR2032 coin cell in your power meter has a nominal operating
voltage of 3.0V, not 1.5V.
<https://data.energizer.com/pdfs/cr2032.pdf>
Some examples of 3V coin cell to 5V boost converters:
"BOOST CONVERTER USING COIN CELL"
<https://www.instructables.com/BOOST-CONVERTER-USING-COIN-CELL/>
"3 Volts DC to 5 Volts DC Converter"
<https://www.edn.com/3-volts-to-5-volts-converter/>
"Single Cell Boost Converter Circuit using Coin Cell"
<https://www.youtube.com/watch?v=3dqnmyHze9_C8>
They might be using a boost converter, but I'm doubtful. More likely
they're using a small micro controller with a regulated reference output >> for both the peripheral (in this case, the straingauge circuit) and an
internal A/D. I didn't search too hard but I'm sure there are models
with a blue tooth radio included, something along these lines:
https://www.microchip.com/en-us/products/microcontrollers/8-bit-mcus/avr-mcus
It would also need a thermometer or thermocouple input to do temperature >> offset calculations for the strain gauge.
At any rate, nothing that can't be accomplished with the CR 2032. IQ2
rates a 80 hour battery life:
https://www.iqsquareasia.com/en/pages/installation-guides
If they are using a microprocessor, they have to use a power supply to boost the voltage. I can't remember any uprocessors that use less than 6 volts and as the voltage starts failing, the input accuracy of the ADC goes all to hell. You can see that since a CR2032 is a 1.5 volt battery you can have conversion failures as the voltage drops. And that is the exact symptoms I reported to you.
CR2032:OK Andrew, I made a mistake about the voltage. What difference does that make? It is still an energy storage unit that empties rather rapidly in my pedals. and as the voltage drops below the accuracy level for the power meter the accuracy continues to fall until it reaches zero.
https://www.mouser.com/catalog/specsheets/cr2032.pdf
This isn't a closely held secret.
Battery makers STAMP "3V" ON THE CASE!
https://www.etechnophiles.com/wp-content/uploads/2022/09/CR2032-Battery-Specs.jpg
low voltage (under 6v) processors from Texas Instruments:
https://www.ti.com/lit/an/sprad89/sprad89.pdf
application notes:
https://www.flywing-tech.com/blog/designing-a-stable-3-3v-5v-power-supply-for-microcontrollers-using-modern-voltage-regulator/
On 8/1/2026 1:59 PM, cyclintom wrote:
On Thu Jul 23 05:51:07 2026 zen cycle-a wrote:
On Tue, 21 Jul 2026 20:12:32 GMT, cyclintom <cyclintom@yahoo.com>
wrote:
When you engage a power meter it changes the calculations to
include Watts as read by the power meter.
So when the power drops on the power meter batteries and it begins
misreading power,
No, tommy, the meter does not misread power as the power source drops.
Power meters have regulated power supplies. The regulator output keeps
the supply voltage to the meter constant until the input to the
regulator drops below a certain point, then the regulator shuts off.
This is tech-school stuff tommy. A real engineer would know better.
it also misreads calories which is ALSO a reading of power consumed.
Which would only be true with erroneous power readings. Since the
accuracy of the power meter does _not_ fluctuate with battery voltage,
the caloric calculation remains just as accurate.
I just deleted the power meter since I'm going to install it on the >>>>> Eddie Merckz that will be here on Thursday.
That was pretty dumb. The power meter doesn't care what bike it's on.
all you did was to create more work for yourself.
The Colnago w3on't be ready to go until the press in Campy
ultratorque fitings get here in August. I will put my Proton wheels >>>>> on the Colnago and move the Ventos over3 to the Merckx San RemoI
will give the Master X Lite a good cleaning and put it up on Ebay.
Please be more specific such as including model numbers?-a It would
also be nice to know what this has to do with calculating or measuring >>>> calories.
Craigslist has become useless.
only as useless as the user.
No it doesn't "shut off" or there would be no need for a low battery
warning.
As you say, this is tech school stuff and you obviously
flunked that.
Wiull you please stop pretending to know anything other
than your QC position.
I keep trying to be kind to you
and you con
tinue to stick your head up your ass.
Well, I suppose no one visits usenet looking for sweetness
and light.
https://www.yellowjersey.org/photosfromthepast/death.jpg
On Wed, 29 Jul 2026 17:21:40 +0200, Wolfgang Strobl...
There _are_ lithium based batteries that deliver 1.5V only. These
aren't coin cells, though and have a different lithium based
chemistry. The power meter I installed on my wife's race bike is
powered by a AAA lithium battery, which provides only 1.5 volts.
An alkaline battery would probably work as well, but it would be
less reliable, according to SRAM.
Alkaline batteries are problems for me. I'm systematically replacing
the leaky alkaline batteries in my test equipment, TV remotes, mice,
etc with rechargeable Li-Ion equivalents. ><https://www.learnbydestroying.com/jeffl/crud/Kirkland-AAA-leak.jpg>
There are several styles. I like the one's with built in USB-C
chargers:
<https://www.ebay.com/itm/800357657779>
4ea 9V batteries for about $20. (I bought these because recently
because I like the "wood grain" packaging). Previously, I've used EBL
brand rechargeable cells. Out of about 16 cells and batteries, only
one failed on arrival.
Ok, back to coin cells. There are rechargeable coin cells, such as
the ML2032: ><https://www.maxell.eu/industry/coin-type-lithium-manganese-dioxide-rechargeable-batteries-ml/>
<https://biz.maxell.com/en/rechargeable_batteries/ml.html> ><https://biz.maxell.com/en/rechargeable_batteries/data_sheet/ML2032_Data_sheet_e.pdf>
"Li-Al Alloy Manganese Dioxide/Organic Electrolyte"
The problem is capacity. A non-rechargeable CR2032 will do 220ma-hrs
while the rechargeable ML2032 will only provide 65ma-hr. The >non-rechargeable CR2032 is also cheaper.
On 8/1/2026 1:59 PM, cyclintom wrote:
On Thu Jul 23 05:51:07 2026 zen cycle--- Synchronet 3.22a-Linux NewsLink 1.2
On 8/1/2026 1:59 PM, cyclintom wrote:
On Thu Jul 23 05:51:07 2026 zen cycle--- Synchronet 3.22a-Linux NewsLink 1.2
I can confirm that. More than half a year ago I went from eating twoI have pretty much the same experience. But the more miles I put in starts to reduce my weight though so slowly that one normal meal seems to completely nullify it. In my case I expect it's my age and there's nothing I can do about that.
main meals per day down to one. Every other day that's a main dish for
lunch, the other days just a sandwich for lunch. Nothing in the evening.
In the morning there is only a small bowl of cereals with milk. Weight
loss? Phhht. Nothing to write home about.
OK Andrew, I made a mistake about the voltage.
What difference does that make?
It is still an energy storage unit that empties rather rapidly in my pedals. and as the voltage drops below the accuracy level for the power meter the accuracy continues to fall until it reaches zero.
Your comments about fantasy still bothers me. When none of the people own power meters, why the hell would you think that their agreeing with me or not would mean anything at all? Two modeling programs that were cited agree with my Garmin. A general Wikipedia comment agrees with my Garmin. Where is the fantasy in that?
On Sat, 01 Aug 2026 19:47:56 GMT, cyclintom <cyclintom@yahoo.com>
wrote:
OK Andrew, I made a mistake about the voltage.
You made a mistake and then repeatedly defended your mistake by
attacking your critics. Maybe you should just look at a CR2023
battery and that it has "3V" inscribed onto the positive terminal. If
you don't believe that, you could just measure the voltage. You
should have a large number of CR2032 cells since your batteries only
last 2 weeks[1].
What difference does that make?
It demonstrates that:
- You don't know anything about the equipment you allegedly own.
- You don't understand battery chemistry.
- You are incapable of admitting that you are wrong.
- You provide insults instead of information when someone demonstrates
that you are wrong.
- You can't be bothered to read the CR2032 data sheet or what's
engraved on the positive terminal.
- It's another demonstration that almost everything your write is
wrong.
- You don't know how to use Google search or an AI to find component
and product specifications.
- You don't know the value of tact, politeness, and reputation.
- You don't know how to use a spelling checker.
- You expect your readers to correct YOUR mistakes.
- You lie, distort and misinterpret information for no obvious
benefit.
It is still an energy storage unit that empties rather rapidly in my pedals. and as the voltage drops below the accuracy level for the power meter the accuracy continues to fall until it reaches zero.
I don't think you understand how battery "fuel gauge" works.
the problem. The discharge curve on Lithium based cells shows an
almost constant voltage from 90% SoC (state of charge) to about <https://biz.maxell.com/en/primary_batteries/data_sheet/CR2032_Data_sheet_e.pdf>
Notice the "Discharge Characteristics" graph is almost flat. That
means if you connect a voltmeter to the battery terminals, it will
show about 90% SoC for most of it's operating life, and then drop like
the proverbial rock just before the voltage hits zero. Not very
useful methinks.
What genuine EE's do is a "coulomb counter". See "Current Integration Method": <https://en.wikipedia.org/wiki/State_of_charge#Current_integration_method> "This method, also known as coulomb counting, calculates the SoC by
measuring the battery current and integrating it in time."
Coulombs are measured in amps delivered over a period of 1 second. It
is NOT a measure of energy which is measured in watt seconds. Since
the battery voltage is fairly constant and the energy storage capacity
of the fully charged battery is known, it is only necessary to measure
the amp-seconds consumed to calculate SoC.
"Battery fuel gauges" <https://www.ti.com/product-category/battery-management-ics/battery-fuel-gauges/overview.html>
Your comments about fantasy still bothers me. When none of the people own power meters, why the hell would you think that their agreeing with me or not would mean anything at all? Two modeling programs that were cited agree with my Garmin. A general Wikipedia comment agrees with my Garmin. Where is the fantasy in that?
Owning a product does not confer upon the owner any intimate knowledge
in how the product functions or operates. You own a computer, yet you
have a very limited understanding on how it functions and how to
operate it.
[1] 10 hrs per week.
<https://www.strava.com/athletes/27432450>
| Sysop: | Amessyroom |
|---|---|
| Location: | Fayetteville, NC |
| Users: | 74 |
| Nodes: | 6 (0 / 6) |
| Uptime: | 120:14:27 |
| Calls: | 1,194 |
| Files: | 1,352 |
| Messages: | 290,005 |
