- Look at the battery and if it's corroded at all, stop here because it can't be flashed.
- Ground the battery by hooking the black alligator clamp from the 12-volt battery charger to the negative end of the old nicad rechargeable battery. The negative end of a single cell battery is the flat end.
- Use the red alligator clamp to "flash" the old rechargeable battery. Tap the positive, or raised, end of the single-cell nicad rechargeable battery with the red alligator clip. Sparks may spray out of the ends of the battery during this process.
- Securely hold both the black and red alligator clamps to the battery for up to three seconds to complete the flashing process.
- Remove the alligator clamps. Retest the battery with a battery tester to see if it has been charged.
Things You Will Need
- 12-volt battery charger
- Dead nicad batteries
- Safety goggles
- Insulated gloves
- Long sleeve shirt
- Battery tester
- Take the necessary precautions to wear safety gear to protect your skin, eyes and handles during the flashing process.