posessed battery
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Cargo Master
Joined: Aug 2004
Posts: 2,899
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From: Lynnwood, WA
posessed battery
I have a battery that wasn't used or charged for quite a while. (my main battery charger is broken) But I found my old (1A) charger, and figured that in a few days I can charge the battery up. Initially, I measured about 5.5V on the battery, that went up to almost 16V after I connected the charger, then quickly dropped to about 8V (as the oxide layer broke, and charging began, I guess). After almost a day of charging, a couple of hours ago I measured only 10.35V on the battery, low enough to make me wonder about a shorted cell. Then I measured it a little later -- 10.45V, @700 mA, so figured it might take a while, but it's making progress. Then I measured it again a few minutes ago -- 8.44V!! 
Any idea what's going on? The charger is ON, cranking out over 800 mA ATM (almost too hot to touch) and I double checked my measurements and the charger.
Any idea what's going on? The charger is ON, cranking out over 800 mA ATM (almost too hot to touch) and I double checked my measurements and the charger.
Thread Starter
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Cargo Master
Joined: Aug 2004
Posts: 2,899
Likes: 2
From: Lynnwood, WA
Yeah, that's what I figured. BTW, a little later it dropped to 6.4V, at which point I figured that charging is a moot point. 
I know that the sulfation happened before, but I've never seen such a catastrophic failure during charging.
I know that the sulfation happened before, but I've never seen such a catastrophic failure during charging.
Last edited by aurgathor; Jan 29, 2005 at 12:52 PM.
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