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Old 04-27-21, 06:18 PM   #6
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Join Date: Jan 2015
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Originally Posted by Xringer View Post
I've got one of those RC chargers (older model) that still works, but my guess is, the DC input to the charger would need to be a volt or two higher than the charge voltage needed for a 12v lead acid.
The 12V SLA that I use for RC is dying, so much that I was unable to recharge some tabbed AA cells with last week. I think it was down around 10v.. (I was replacing the batteries in my razor, and wanted to test them).
They actually don't need the input voltage to be higher than the output. I've always run mine off a 12v xbox 360 power supply and used it to charge batteries higher in voltage. The specs for the charger I linked to says the input voltage range is 10-28v, so that 10v lower limit is probably what you ran into.
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