- 1). Place your old batteries in the drill. Turn the drill on and let it run until it stops, which is when the batteries are completely drained. This is called discharging your battery. A battery that is not fully discharged will not be able to be properly reconditioned. Allow the batteries to rest for a few minutes. Turn the drill on; it may work briefly due to residual power in the batteries. Repeat until the drill will not work; the batteries are now fully discharged.
- 2). Plug the battery charger into an electrical outlet. Place the used batteries in the battery charger. Be sure to connect the negative side of the batteries with the negative marking on the battery charger. Do the same for the positive side of the batteries, making sure they are aligned with the positive marking on the battery charger.
- 3). Press the charge button on the battery charger. Allow the batteries to charge. The LED indicator will be green, signaling the batteries are fully charged. You may need to repeat the reconditioning process for some batteries a few times in order for them to be fully reconditioned.
- 4). Repeat this process once a month to maintain your batteries.
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