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Old 12-26-2018, 07:21 AM   #9 (permalink)
Stubby79
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Quote:
Originally Posted by Piwoslaw View Post
My new e-HDI engine has an AGM battery for the Start&Stop feature. I'm looking for info on how to charge it to keep it healthy.

What do you think? Is 3.8A @ 14.7V better for my new AGM battery than 0.8A @ 14.4V?
It should help keep the cells better balanced than a lower voltage, in theory.

Not sure if AGM need the voltage to drop off(down to 13.8) after 80% SoC is reached, but I would assume so.

If you want any kind of lead acid to last a while, try and avoid letting the SoC drop much below 50%. You can get ~1000 charge cycles that way, rather than 2-300 if you drop it down to 20%. I'd also avoid pulling more than ~1C out of the battery for more than a few seconds at a time.

Back to your regularly scheduled programming...
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