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Old Feb 22, 2002, 04:34 PM
Registered User
N. Andover MA
Joined Sep 2000
157 Posts
charging a lead acid battery

I found a 12V 33amp-hr lead acid battery. Can I charge it via my CG-330 Hitec charger using my car battery as an input source?
Or, does anyone know of a way to make a charger? Perhaps with a computer P/S...5V....12V....etc???

Thank you all in advance.
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Old Feb 22, 2002, 07:45 PM
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Worcester, MA.
Joined Nov 2001
1,408 Posts
Why not go to WalMart and buy a charger? There pretty cheap, probably in the $20.00 range, and you won't have to worry about blowing up that battery.
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Old Feb 23, 2002, 02:58 PM
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Is it sealed? Or can you top it up with distilled water?

A sealed lead-acid battery will need a dedicated constant voltage charger to avoid overcharging and drying out the 'gel'. IIRC the constant voltage is set to 14.4V.

If it is not sealed, then a regular car charger can be used.

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Old Feb 23, 2002, 10:26 PM
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San Antonio, Texas USA
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What about if it is sealed. I have one and can't figure out how to charge it?
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Old Feb 24, 2002, 06:41 AM
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United Kingdom, Bracknell
Joined Nov 2000
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The best bet is to get a proper charger that's intended for deep cycle/sealed/gel batteries. Mine cost 19.99 (=$28.60) about 6 years ago, and it's fantastic - microprocessor controlled, you can leave any battery permanently connected if you want as current is continuously monitored & adjusted.

Car battery chargers are cheap & easy to get, but usually way too aggressive.
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Old Feb 24, 2002, 11:45 AM
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chrisc's Avatar
Joined Sep 2000
478 Posts

My Orbit V6.0 charges Lead Acid battery up to 70 amps capacity. Trouble is you need a 12 V 15 - 20 Amps power supply to power it.
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Old Feb 24, 2002, 11:10 PM
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Joined Feb 2001
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Ace CVC (for constant voltage charger) charger specially designed for gel cells and lead acids. Sealed or unsealed is insignificant.

Or, if you are good with electronics I believe there are a few schematics of easy to build constant voltage chargers for gel cells here:


The site was provided by someone here on the Zone.
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