FEATURES USB powered with a charging current of 750mA. Compatible with lithium batteries with a rated voltage between 3.6V and 3.7V. NiMH batteries. Charging for dummies. There is no need for matching the polarities, as the charger can automatically recognize them when in use. All sizes compatible. It works perfectly on cylinder shaped batteries of variable diameters and lengths. Tangle-free flat cable design. Easy for storing and organizing. SPECIFICATIONS Main Material Silicon (Cable wrap), rubber (body), aluminium alloy (battery polarity and connection cable) Dimensions (L)300mm x(W)8.7mm x(TH)21mm Weight 20.5 g Color Black(Cable), Blue(Cable Spliter) Powered by Cylinder shaped rechargeable lithium and NiMH batteries Rated Voltage 4.7V to 5.2V Charging CC & CV rechargeable lithium batteries CC-DELTA V NiMH batteries Red indicator (Blinks 3 times per second) - Standby Red indicator - Charging Green indicator (steady) - Charging Completed Max.Charging Current 750mA Max. Charging Voltage 4.25V for rechargeable lithium battery 1.45V for NiMH battery Charging Cut-Off Points When the charging current drops down blow 100mA for re chargeable lithium battery. Delta V (when the voltage drops after it is fully charged) for NiMH battery.