... devicesSpecification: Packing3.7V Li-Ion rechargeable battery made of 4pcs High quality 2200mAh cylindrical 18650 cells with PCB ... charged & discharged at anytime because of non-memory.7. Environmentally compatible.8. High level of safety, vision Lithium ion batteries catch ... on.Product Application:GPS Tracker, LED, medical devices, kinds of meters, portable instruments, PDA, Power tools, miner's lamp ...