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Recharge the battery for twice as long as recommended.recharge de piles image by Jean-Michel POUGET from Fotolia.com
Place the NiCad battery in the charger and leave it for 24 hours. The simple act of recharging your battery for twice the recommended charge time (or longer) may get your battery working again. - 2
Charging and discharging your battery completely, and then charging it again restores your battery.Hand yelow drill isolated image by Marek Kosmal from Fotolia.com
Discharge the battery immediately after recharging it. If the battery is attached to a drill or other such device, leave the device on by taping the trigger and leaving it that way until the battery is fully discharged. Immediately place the batteries back in the charger, wait until they are recharged and repeat the process. Each time you perform this step you will get a small boost in battery memory. - 3
A large DC battery can be used to shock a smaller NiCad battery.battery image by Hao Wang from Fotolia.com
Burn out the crystals that are shorting out the battery by "shocking" the batteries. Use electrical wire to connect the NiCad battery to another higher voltage "charger" battery by affixing the positive end of the NiCad battery to the positive end of your charger battery and the negative end of your NiCad battery to the negative end of the charger battery. Leave the batteries connected for only a short time. Use a DC source three to four times more powerful than your NiCad battery. A motorcycle battery is recommended for two to three repetitions at half-second intervals. - 4
Freezing rechargeable batteries may temporarily restore them to normal usage.ice cube image by sheldon gardner from Fotolia.com
Freeze your batteries before charging them. Turn your freezer to its coldest setting and leave the batteries in overnight (or if you can get a hold of dry ice, you can pack the batteries in dry ice). You may gain an additional month or two of usage after freezing the batteries.
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