agm battery life

Question

question buddy has two durcell 31 agm batteries he wants to sell ,used them for three years in a cabin for lights  etc. he now has electric. is there much life left in these? I been thinking about a using them in my little boat with a 12v trolling motor.  he took them back an forth to recharge them . any opinions appr.

rgatijnet1 · Answer

Mine are still going strong after 6 years. Have no idea how much longer they will last.

robwny · Answer

Too many variables to even guess how much life is left in them. If they're still good and he's giving them to you, you aren't out anything if they don't last other than your time and effort. If he wants $$ for them, I wouldn't bother.

naturist · Answer

Agree with RobWNY. It isn’t a question of age, it’s a question of charge/discharge cycles and depth of discharge. If taken to near complete exhaustion, they might be completely killed in only a couple hundred cycles. At best, they are good for maybe 1500 cycles, but that also depends on their design.

pianotuna · Answer

If they had been maintained by a solar charging system, I'd be interested. But back and forth? Nope, not for me.

midnightsadie · Answer

thanks, I,ll pass he wants $90ea for them .I,ll put the extra in and get new.

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