In technical terms, you probably have a "sulfated" battery.
In car sizes, 5 amps for 24 hours should get it charging in the
right direction. Smaller battery, less current. It will take a
while. You will be forming the battery, giving it its initial
charge.

Go for it.

Jim


mike writes:

: I bought a pair of electric scooters. They'd "fixed" the charger
: and managed to get the batteries charged backwards. Can I discharge
: them and charge 'em up forwards? Any special techniques? Fast/slow/
: charging?
: May be a moot point as I expect the speed controller box is fried too.
: mike

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