Cordless tools are handy but its life is always rely on the battery. This video shows how to reactivate a faulty battery. The idea can be adopted on any type of rechargeable battery, just by applying the right voltage.

Same idea can be use on Dyson vacuum cleaner, cordless hair cutting tool, or on typical 1.2V AA, AAA size batteries.

Please leave any comment or idea if you have.

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