The battery was like this from day 1 of purchase. its about 2 and a half years old and hasn’t changed even with some light to moderate use. mainly being on standby/float at 13.5v or sitting after a full charge. never discharged below 75% full even.
One side seems slightly distorted or bulging outwards a little. but it sounds hollow like theres just a void of air inside. I can easily press it in with my hand if i press firmly against it. you can see it a little but its not a lot
The other side is almost perfectly flat. but still slightly deformed. Not a lot though.
There doesn’t seem to be any “pressure” behind it either.
Is this just a slightly deformed battery casing during manufacture or something like that? It doesn’t get warm in use and theres no bad cells.
battery still works like new.
Should I be worried at all? Or just continue using like normal as long as it continues to give expected capacity and useful output?
Edit: Also another question.
is it ok for the battery to stay in absorption until current drops to significantly below 1 amp.
like say 0.1A or 0.5A? is that ok to put a more thorough charge put into the battery?
or will that slightly overcharge some or all the cells. or cause degredation or something?
since thats what im reading most articles cut off absorption stage at roughly for this size battery.
is that going to create too much gas buildup being at absorption for a little longer?
at float of 13.5v it would take many many more hours for the battery to reach low-level idle standby current.
The battery is used like a backup electric generator with a 1000w power inverter in case of power outage or something
(in apartment we can’t have a loud big noisy gasoline generator)
Or maybe its not neccessary to wait for absorption to reach lower current and 0.5-1A is fine to switch to float voltage?
no need to wait for it to go lower?
am I hurting the battery any meaningful amount by giving it slightly longer absorption time? or is the battery more likely to “die of natural causes” due to age rather than what I do with the amount of absorption current before switching to float?