another source for agm batteries
Hi, It's time for me to consider replacing four of my batteries that are now 8 years old. I came across this on Amazon. Any one have an opinion on this company? http://www.vmaxchargetank.com/...
Forum Discussion
There was mention earlier of a time factor to recharge. I first noticed "progressive capacity loss" when it took less and less time to do a 50-90 when doing several in a row.
So however you define your full recharge, as long as you can measure your starting point and finishing point (I use "morning voltage" at 12.1 as my 50% starting point) and stick to the same routine, you should be able to tell if the AGMs are losing capacity the same way. No hydrometer required.
Another clue using time is that your constant amps stage lasts less time before tapering starts as part of the above, so you already know without having to wait till the end.
So however you define your full recharge, as long as you can measure your starting point and finishing point (I use "morning voltage" at 12.1 as my 50% starting point) and stick to the same routine, you should be able to tell if the AGMs are losing capacity the same way. No hydrometer required.
Another clue using time is that your constant amps stage lasts less time before tapering starts as part of the above, so you already know without having to wait till the end.
