Quote:
Originally Posted by 80stech
I 'think' that's saying the AGM is more susceptible to overcharging at higher voltages (and amps) (17v they say) so I can't see that being a big problem unless someone leaves a charger on for too long or maybe a maintainer with a high voltage which isn't good for a regular battery either. On the other hand you are saying that the AGM will only be at 80% with a regular charger ??
I'm going to check my chargers tomorrow, the newest I have is about 5 or 6 years old and I have only charged an AGM battery once in my lifetime so far!  |
I've seen other info. that indicates that the optimal charge profile for AGM is a little different than for wet cells, hence the inability to achieve a full charge with some standard chargers.
Lead-acid batteries reach about 80% of the total charge capacity via "bulk charge" and the remaining charge is achieved via "absorption charge". It's possible that some older charger types can fail to detect this charging stage point and therefore do not fully charge the AGM battery types.
This means that (in theory) a car's charging system would need to take AGM into account but I've run AGM batteries in older vehicles (like my BMW motorcycle) with zero issues. YMMV