- Feb 21, 2023
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- 11,450
What is the maximum voltage you can charge an AGM battery? I've seen most modern smart chargers say 14.3 to 14.8 volts for sealed AGM batteries.
I've got three of these X2s from Batteries Plus (very good batteries) in my boat and they all seem to be going to hell at the same time. I thought it was on board charger, but that seems to be working after some testing.
I have about 5 different chargers and I was able to get them charged up to 13.8V using an old school Schumacher analog charger, then Optimate smart charger, then back to my Bass Pro onboard charger. But they won't stand up to a load.
I'd like to blast them with about 16.5V at 2.5-3 amps for awhile to blast away any sulfates. But don't want to do any damage or vent any water. I know that voltage works for flooded lead acid batteries with caps for venting.
That 20 AMP onboard charger hits 15.8V, but not sure that's sustained for any length of time.
I've got three of these X2s from Batteries Plus (very good batteries) in my boat and they all seem to be going to hell at the same time. I thought it was on board charger, but that seems to be working after some testing.
I have about 5 different chargers and I was able to get them charged up to 13.8V using an old school Schumacher analog charger, then Optimate smart charger, then back to my Bass Pro onboard charger. But they won't stand up to a load.
I'd like to blast them with about 16.5V at 2.5-3 amps for awhile to blast away any sulfates. But don't want to do any damage or vent any water. I know that voltage works for flooded lead acid batteries with caps for venting.
That 20 AMP onboard charger hits 15.8V, but not sure that's sustained for any length of time.
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