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Charging sealed-lead-acid batteries in series?

post #1 of 2
Thread Starter 

Is it a problem to trickle/standby charge two sealed-lead-acid batteries that are hooked up in series, as if they were one big 24V battery?

I have a Hagerman Bugle phono preamp that runs off two tiny 12V sealed lead acid batteries. The batteries are in series arranged with their junction as the 'virtual ground', so they look like a +/- 12V supply to the amp.

Right now, I wait till the batteries go dead, and then charge the batteries one at a time using a taper charger, to 13.6V. This is inconvenient, and it's abusive to let the batteries run dead, so I would like to rig up a continuous charge system. For the power switch, I have a 3-pole dual-throw switch, with a charge port hooked up to the opposite throw as the amp, so when the switch is turned off, the batteries are connected to the charge port. So basically if I hook up the charger full-time, the batteries will be connected the charger when the switch is set to "off" and they will be connected to the amp when it's set to "on". I can't conceive of a double-ended battery charger, but I could charge both batteries as one big 24V battery. Is there a problem doing that?

post #2 of 2

Seeing as most all lead/acid batteries are series cells already, I'd say "no problem".

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