... battery4) Perfect for building batteries for laptop and other portable power devicesSpecification: Packing3.7V Li-Ion rechargeable battery made ... 10% monthly.5. Wide temperature range, operation from :-20°C~+60°C6. Be charged & discharged at anytime because of non ... Application:GPS Tracker, LED, medical devices, kinds of meters, portable instruments, PDA, Power tools, miner's lamp, Audio and ...