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I have a Schumacher SE-5212A charger and it will not charge a battery. Regardless of whether it is on the 10 or 2 amp setting the needle will drop down and the full charge light will come on in about 10 seconds. I have tried it on three batteries and it does the same thing. I left it hooked up to my lawnmower for 5 hours today and it didn't charge it at all. The battery has 9.6 volts so it was not completely dead before trying to charge.

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Posted on Jan 02, 2017

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SOURCE: Schumacher 2/10/50 amp charger,125/225 amp starter

It could be an internal fuse, or that the transformer is malfunctioning.

Before any dis-assembly/internal inspection, be sure that the unit in unplugged.

Good luck...

Posted on Feb 25, 2009

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