How to recharge button cell batteries

Written by tzvi raphael
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How to recharge button cell batteries
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Button cell batteries are known for their small features. These thin energy cells are used to provide battery power for hearing aids, electronic devices and watches. They require a very thin profile, allowing gadgets to benefit from their compact nature and style. Most people buy new button cell batteries whenever their old ones run out of power. However, it is possible to recharge your button cell batteries without seeking the help of a professional. Recharging batteries, versus buying new ones, will save you money.

Skill level:
Moderate

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Things you need

  • Clear tape

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Instructions

  1. 1

    Insert your battery into the open slot of the button cell battery charger. Use clear tape to seal it in place if the battery does not fit tightly into the charger.

  2. 2

    Switch on the charger’s power button and charge the cell battery until it reaches the terminal voltage of 2.40 to 2.45 volts per cell at 14.4 degrees Celsius. This is equivalent to 14.4 to 14.7 volts for a 12-volt battery, with a temperature of 20 degrees Celsius, and will place your button cell batteries on cyclic or fast charging.

  3. 3

    Leave your battery on this voltage until the dial shows a charge current of 0.01 x C amps. Most battery amp-hour rating is at C.

  4. 4

    Turn off the battery charger and remove the newly charged button cell battery.

  1. 1

    Insert your battery into the open slot of the button cell battery charger. Use clear tape to seal it in place if the battery does not fit tightly into the charger.

  2. 2

    Switch on the charger’s power button and set it on float charging mode. Charge the button cell battery at a continuous voltage of about 2.25 to 2.30 volts per cell at 14.4 degrees Celsius. This is equivalent to 13.5 to 13.8 volts for a 12-volt battery, with a temperature of 20 degrees Celsius. The charger will regulate your button cell batteries into its own current level.

  3. 3

    Turn off the battery charger as soon as the button cell batteries are completely charged. You can check the dial to determine the status of the battery’s charge. Remove the battery from the charger.

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