Amazon.com has a Dremel battery and charger for sale. How do I know when?

Once fully charged, the green light will illuminate from the battery life indicator, which will turn off.

Do Dremel batteries go bad?Like most power tools, the battery pack is filled with cheap nickel cadmium cells that don't last very long on a charge and will start to wear out after a couple years.

The product has a charge time of 3 hours and a warranty of 2 years.

The unit is charging the battery when the green light is on.The unit is charging the battery when the green light is on.