The Dragon VP4 Plus is Xtar's top of the line battery charger and analyzer with a maximum charge rate of 2A on the outer two slots, and a system max of 1A for all 4 slots. The built in battery analyzer can discharge and recharge batteries displaying the capacity discharged and charged. The built in test leads will measure internal resistance in a battery as well as display the voltage. USB output and a 11.1V 3S dedicated charge port for lipo packs makes this one of the most feature rich chargers we carry. Features: * Test battery internal resistance and voltage * Test battery real capacity * Charge all popular Li-ion/Ni-MH batteries and 11.1V battery packs * Optional 0.5A/1.0A/2.0A charge currents * REFRESH Mode to eliminate memory effects * USB output function * Informative big LCD screen display * Record function Brand: XTAR Unit: 1Set Input Power:DC 12V 3A Cut-off voltage: Li-ion 4.2V +/- 0.05V Ni-MH/NiCD: 1.45V +/- 0.1V USB Output Function: DC 5V 2.4A Max 11.1V/3S Battery Pack Charging Current: 1.0A Charge current: 0.5A * 4, 1.0A * 4, 2.0A * 2 Dimensions: 158mm * 147mm * 40mm Package: Gift Box Each set contain: 1pc Xtar VP4 Plus Charger 1pc Xtar DC 12V/3A Adapter 1pc Xtar 3A Car Adapter 1pc Pair of Probes 1pc Xtar Pouch 1pc Warranty Card 1pc User Manual