From Newsgroup: rec.autos.tech

Back in the dark ages you filled the battery until you saw a curved
rather than flat surface. Is it the same now? The battery in my 2013
Corolla was in it to my knowledge when I bought it in 2016 and I haven't changed it. I drive maybe 4K miles/year in SoCal. The battery shows NO hesitation whatever when cold starting. 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. I liked the individual caps better than
the 3-cap thing it has now. 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?
--
Cheers, Bev
Organized people will never know the sheer joyous ecstasy of finding
something that was believed to have been irretrievably lost.
-- D. Stern
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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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