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agm battery

 
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Old 04-13-2019, 06:59 PM
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agm battery

I didn't find anything searching, doesn't mean its not there, just I cant search well. I've tried harley forum, but thats all double talk. (talking out their rear)
My agm battery is less then 4 yrs old, sits on the maintainer when I'm not riding.
Harley meter said 12 volts, barely cranked, but it did start. Moved it out of garage for spring wax. hooked up maintainer, Maintainer said battery at 9%.
9%, ouch. Time for a new one I assume. Whats lifetime for agm? I've done better with plain lead acid units in past, without a maintainer over winter.
Maintainer spits out 14.x volts, harley charging spits out 14.x also. Battery spits out 12.x after removing maintainer.
Do I just have bad battery, or bad charging?
Upgrade to lithium or go back to lead acid?
 
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Old 04-13-2019, 07:08 PM
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I do not know all the ins and outs, but they do say you need a certain charger for a certain type battery. Some chargers let you program what battery you are using.
 
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Old 04-13-2019, 07:16 PM
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My charger has different settings for AGM and non-AGM batteries.

I just put AGM batteries in my trucks last year, so I hope they last longer than 4 years. They definitely have much stronger starting power than regular ones.
 
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Old 04-13-2019, 07:39 PM
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I'm guessing this is a motorcycle battery? If you get 5 years out of one, that's pretty good.
 
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Old 04-13-2019, 08:24 PM
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AGM batteries don't like and don't need to be float charged. Especially at a high voltage as the gel will crystallize. What charger are you using? Also what brand of AGM? The only AGM's worth anything are Northstar or Odyssey.
 
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Old 04-14-2019, 02:42 PM
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will dig under seat and find what battery this week.
 
 


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