Specification: System: Tri-chemistry six unit rapid charger Housing: Flame retardant PC/ABS Battery Chemistry: Nickel-cadmium (Ni-Cd), Nickel-metal-hydride(Ni-MH), Lithium-ion (Li-ion), Lithium-polymer(Li-polymer) Temperature Management: Nickel-based: 0°C-50°CLithium-based: 0°C-45°C. Charge current: 800mA-1500mA Battery mAh/V: 500mAh-4000mAh Charge time: Nickel-based chemistries: 90 minutes typical; longer on larger batteriesLithium-based chemistries: 3h typical; longer on larger batteries Light signals: Flashing yellow: un-chargeable battery Flashing red: over-current or over-temperature Steady yellow: Battery is in slow charge mode or in pre-charge mode and waiting for rapid charge Steady read: rapid charging Flashing green: charged about 80% capacity Steady green: full charged Cooling: Silence cooling fan control by micro processor Electrical: Input: 100-240V 50/60Hz 3.0A Output: 5-12V 1.5Ax6 (two internal switching power adapter) Approvals: CE(EMC,LVD), FCC, RoHS Environmental: Operating temperature: 0°C to +40°C (32°F to +104°F) Storage temperature: -30°C to +70C (-22 to +158°F) Dimension: 480x160x88mm Net Weight: 2.7kgs Package: parper carton, one power cord included Warranty: Three year warranty on parts and labor