15.6V 3.0Ah NIMH Type "N" high capacity battery back with no memory effect. Stnadard accory with EY6535NQKW (Multi Drill & Driver) and EY6432NQKW (Drill & Driver, EY3530NQKW (Metal Cutter) EY6432GQKW (Wood Combo Kit and EY138NQKW (Metal Combo Kit). Option accory for EY6432GQKW and EY6432FQKW (Drill & Driver), EY6932GQKW (Hammer Drill & Driver) EY3793B (Lantern). Charging times appox 45 mins with EY0214B & EY0230B chargers and approx 90 mins with EY0901B Universal charger.