A:AnswerYou can tell by the 3 lights by the power button. If they are flashing it’s charging. They will be solid when fully charged.
The photo shows it’s still charging.
A:AnswerLess, about 11 volts as most other current B+D handhelds. It does have 2.5 battery cells where most others in the lineup have 1.5 or 2 cells. It provides 35 AW for about 20 minutes.