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Old 07-10-2007, 05:34 PM
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Trouble charging battery

I've got a battery charger hooked up to just my battery (optima red top) and my charger keeps pegging out and buzzing for about 3 seconds then drops back to 0, any ideas on what's going on? I've got it set on 12 volts. This is really puzzling me. Thanks.
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Old 07-10-2007, 06:24 PM
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Quote:
Originally Posted by muzzfactor
I've got a battery charger hooked up to just my battery (optima red top) and my charger keeps pegging out and buzzing for about 3 seconds then drops back to 0, any ideas on what's going on? I've got it set on 12 volts. This is really puzzling me. Thanks.
Doc here,

Yup..

The battery is either totally dead..or shorted..

The peg and pop is the thermal reset inside the charger..from over current.

What you can try, is set it for 2 amps , this will lengthen the cycle, and let it cycle about an hour..IF it quits "poping the reset" and the gauge starts to decline, then set it to 10 amps..

When done, get a load check..you may have bad cells..

Doc
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Old 07-10-2007, 06:33 PM
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I don't think the battery is totally dead, because when it was in the car and I pulled the light switch, the lights come on very faintly. My battery charger only has two available settings, 6volts or 12volts. Should I set it to 6volts?
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Old 07-10-2007, 06:51 PM
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Originally Posted by docvette
Doc here,

Yup..

The battery is either totally dead..or shorted..

The peg and pop is the thermal reset inside the charger..from over current.

What you can try, is set it for 2 amps , this will lengthen the cycle, and let it cycle about an hour..IF it quits "poping the reset" and the gauge starts to decline, then set it to 10 amps..

When done, get a load check..you may have bad cells..

Doc







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Old 07-10-2007, 07:13 PM
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The optima batteries when discharged to a very low condition requires more current than a normal wet cell to get it back up. You will need a charger rated at 40 amps or more. Try about a 30 minute high amp charge then disconnect it and try your smaller charger. Keep up this procedure until your small charger can handle it or...............go for broke and leave the big charger on. Keep checking the battery and feels the least bit warm, shut off the charger and come back the next day and continue until you get it back up. There's nothing shorted in the battery it's just normal for the Optima.
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Old 07-10-2007, 08:29 PM
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Since this is the 2nd Optima battery I've had in the past month, (the 1st one was leaking and started to corrode my battery tray, so much for being 'leak free") I took it back in to AutoZone where I purchased it and they tested it and it came back "Bad Battery". Needless to say, I'm DONE with Optima Batteries!!!!! Don't waste your money on these pieces of crap!!!!
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Old 07-12-2007, 07:15 PM
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Doc here,

For testing, and construction, and some bench applications..

I USE A $19.95 K~Mart cheapo Lawn and Tractor battery..about 1/2 the size of a regular battery. I don't recommend it for long term installs though.

I was amazed to fine these lasting 3,4,5 and sometimes 6 years..in a testing environment.

Doc
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