... polymer lithium-ion battery cells, safe and environmental-friendly; portable Power Bank 3. Elegant and beautiful industrial design, ... Recharge CyclesCharge to 100% Up to 500 timesEstimated Working Life:5~8 yearsProtection Functions:Built-in protection functions ... cameras, handheld game consoles, Bluetooth devices and so on. portable Power Bank Product color:Black, Silver, Red, Blue, PurplePackage ...