Our product is characterised as below: “Environmental Protection and Smart Chip control” technology, energic power, longeuselife, higher stability, no memory effect, fast charge, longer cycle life.We have spent large fund on development and research of the “Environmental Protection and Smart IC controlled” to guarantee the safety and reliablity of each battery after 72-hour aging test.PC and bullet-proof case combined with accurate Ultro-sonic welding can prevent any damage and aging. Thus help you to use. The battery in easy way and longer using time.5 auto-protection functions on over charge, over discharge, over current, over heating and short circuit. Instruction of use: Please choose the matched Apokin battery according to your present laptop.Please confirm if the battery is charged well before use. You’d better charge the battery with Apokin adapter or orginal adapter.Please do a full charge and discharge for the battery every 3 months if you don’t use the battery in a long time, then store it in a dry and cool place. For other information, please refer to the instruction of you laptop. Caution: Do not connect the battery anode and cathode any metal objects. Don’t throw the battery into fire in case of any explosion.Do not disassemble the battery by yourself.Special warning : There is hidden danger to your laptop if you use poor quality battery.