Protection Circuit (Against over charge, over discharge, over current and short-circuit.)
Charge Voltage by USB: 5V
Over 300 charge-discharge cycles
Dimension: Length 76.7mm, Diameter 21.4mm(±0.2mm)
Weight: 75.0g
Warranty : ONE YEAR warranty from the date of purchase. Overdischarging or battery leakage is not covered nor is fast draining of battery while using. Please keep the voltage of all Li-Ion batteries above 3.8V for healthy storage. Recharge as soon as possible when you have run them down. Storing a depleted ( less than 3.6V open voltage ) battery may damage/ shorten life/cycle permanently. Basically warranty only covers when your battery is above 3.6V however does not produce any power, other than this NO WARRANTY.