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How to Recondition Cordless Drill Batteries
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You can recondition cordless drill batteries that are nickel cadmium (NiCad) or nickel metal hydride (NiMH). These batteries wear down and eventually die out. It is possible to correct this technique and make your Makita BL1850B cordless drill batteries work like new again.
Remove the dead battery pack from the cordless drill.

Utilizing the volt meter, determine that leads on your own battery case are negative and positive. Mark the positive lead, in order that it is easier to reassemble your battery case after the reconditioning process.

Unscrew the cordless drill battery for Paslode 404717 to open and reveal the battery cells to recondition. Observe the inside spring and that means you don't lose it. This piece tends to snap out or pop away when the case is opened. Carefully lift off the top of the battery case.

Place the tiny screws and the spring right into a small container to make them better to find during reassembly.

Grab the cells from underneath casing. They should come out as one piece that's banded or shrink-wrapped together.

Mark the most notable of the silver cardboard insulator at the stage w here the wires go from the terminal into the battery pack. Again, this can make it easier to reassemble.

Remove the terminal piece with needle nose pliers. Don't let the wires cross or touch in this removal. There is a risk of electrical shock or an explosion if you let the terminal wires cross. Set this piece aside with the screws and spring.

Insulate the exposed metal band with electrical tape. This metal piece will undoubtedly be hot during the reconditioning process. Wrapping it in tape will protect you from injury.

Lift off the silver cardboard insulation piece that covers the rechargeable battery cells. Place this piece aside.

Cut the shrink wrap from the very best of the batteries, just enough to expose the most notable and bottom of the battery leads.

Set the volt meter to 2 volts and test each individual rechargeable battery cell. Mark all saw batteries with a volt meter reading of 0 or negative. This can denote which batteries within the pack need to be reconditioned.

Prepare your external 12-volt power source to zap the batteries you have marked to recondition. Placed on afaids to protect the hands, eyes and skin in this potentially hazardous process.

Locate the negative and positive ends of the first battery to be reconditioned.

Hold the black alligator clamp, powered from your own 12-volt source, contrary to the negative end of the battery and the red clamp against the positive end for a maximum of two seconds.

Take away the clamps and test the battery to see whether it took the charge. If it reads more than 1 volt on the volt meter, move ahead and recondition another cell. If the cell will not read a lot more than 1 volt, zap it again. The cell can be zapped around 10 times.

Continue the procedure until all cells within the battery pack have been reconditioned.

Reassemble more info .

Place the reassembled battery pack onto the drill battery charger overnight. The next day your drill should work like new.

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