Our charger adopt the advanced switching power supply which with high efficient and adopt the advanced control chip circuit, can check the battery &stop charge automatic when finished charging, can protect battery and mobile phone batter.Specifications: Just two replaceable AA batteries or just alternating current, our travel charger can charge for all types of Li-on batteries used in the mobile phone, digital camera, video camcorder ect;Just two replaceable AA batteries or just alternating current, our travel charger can charge for most of all types mobile phone, digital camera, video camcorder, by USB PORT. HawFung brand emergency mutifunction chargeris special super mutifunction charger designed for 3.7.4.2v chargerable batteries and devices which get power from those such as mobile phones /camera/mp3/mp4 and so on .its struction is unique and techonoical ,and it in a small body and a beautiful apperance,which is conveninet to bring.---product Features: a.identify positive and negative port on output automaticallyb.being of two Connectors can charge batteries directly .c.a input istallment specification AA Alkaline or Ni-MH chargerable battery ,two AA battery connect change circuit between DC and DC to raise Voltage and charge battery make use of outputting the ports d.being able to charge batteries derectly with 110vAC---220VAC connectors.e.standard usb2,0 output Socket is provided. set two batteries in the device in a correct direction ,then use hte original usb cable to charge.=.a unique perfect measure to protect circuit.,can protect overcharge/over electric current/overleakage/shortage lots of functions.emergency mutifunction chargermutifunction;it is adapted to digital and mobile devices ,such as mobile phone,mp3mp4,mp5,camera snd so on emergency;you can charge any where ,any time.put 5th or 7th battery (no matter it can charger)in ,you can charge with usb port any timeaccess to AC220v most Li batteries can be charged