DEWALT DCB100 12-Volt Max Fast Charger The maximum initial voltage on 12-volt max batteries (measured without a workload) is 12-volts. Measured under a workload, nominal voltage is 10.8. Charges all DEWALT 12V MAX* Lithium-Ion batteries Charges the battery in 40 minutes or less thus minimizing downtime Diagnostics with LED indicator communicates battery charge status: charged, charging, power line problem, replace pack, and battery too hot or too cold