The compact charger plugs straight into a socket and chargers AAA, AA and 9 V batteries as well as USB devices and comes with an LCD that displays charge status. Safety features such as the timer and detection of defective batteries ensure safe operation at all times. Highlights: - Form factors: Micro, Mignon, 9 V - Technology: NiMH Max. no. of charging bays: 4 (AAA/AA), 1 (9 V/USB) - Charge time: 5+ hours Note: Four 2100 mAh batteries included.