Question about Makita 12 Volt Cordless Drill/Driver Kit

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Drill runs slow with each of two batteries

I don't know if its a battery problem but both batteries fully charged run the drill at the same slower speed.

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This can be problem with worn brushes - especially if drill was extensively used. In case drill is new, problem would be probably elsewhere, also trigger can be defective and it does not let all energy go to motor. Juraj

Posted on May 17, 2010

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It can be a problem with the batteries - if you check their voltage and it is lower than nominal (specified on the battery sticker) - then one or more elements in the battery is dead (each element is 1.2 Volts, so in 12 V battery there are 10 of them). If you dare to disassemble the battery (you'll need rubber/wooden hammer for it, to break glued seams, patience and accuracy), you can replace dead elements (tear off dead ones with pliers from metal buses - remember NOT TO SHORT CIRCUIT BATTERIES !!!, and solder new ones in their place with tin/lead solder, just use a tablet of aspirin as a flux).

Posted on Jun 04, 2010

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