Do Rechargeable Batteries Lose Charge. Department of Energy found microscopic. Hold the red clamp on the positive end and black on the negative end of the rechargeable battery for no longer than three seconds.

As your battery continues to cycle it gets thicker. Excessive heat or cold can cause rechargeable batteries to lose their ability to charge and maintain a charge. Beside the answer already given.
As your battery continues to cycle it gets thicker.
Disconnect chargers and devices with rechargeable batteries after the battery reaches full charge. Full charge and discharge. This doesnt apply to Li-Ion models. Charge The Rechargeable Battery.

