From Newsgroup: rec.autos.tech
The Real Bev wrote:
Back in the dark ages you filled the battery until you saw a curved
rather than flat surface.a Is it the same now?a The battery in my 2013 Corolla was in it to my knowledge when I bought it in 2016 and I haven't changed it.a I drive maybe 4K miles/year in SoCal.a The battery shows NO hesitation whatever when cold starting.a I'm amazed that the thing has lasted this long, but don't see a a reason to replace it.
Added some water, but didn't want to add too much -- if there is such a thing short of actual overflow.a I liked the individual caps better than
the 3-cap thing it has now.a Overnight charging (2A, decreasing) allowed cranking at 8 and 9V.
Am I being foolish, or would it be foolish to replace this seemingly
really good battery?
You could have a resistive load test done on the battery to help
determine its condition. Some auto parts places will do that for free.
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