Three triangulated raised dots ensure solid cell to cell connection when used in series.
PCB protection against overcharge/ over discharge / short circuit.
Safety vent with thermal cut off protection.
Heat Resistance Layer (HRL) technology that forms an insulating metal oxide layer between the positive and negative electrodes. The layer prevents the battery from overheating even if a short circuit occurs.
Featuring a new polyimide insulated ultra thin (0.09mm) pcb connecting flexi strip that is heat resistant to 500F ( instead of a bare metal strip ). This new polyimide insulated flexi strip will protect the battery from a direct short in case the outer plastic wrapper of the battery is torn / damage. The new design also makes these 3100 the slimmest protected 18650-3100 available.
Warranty : 30 day 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.