Unsecured, 21700 Li-ion XTAR 35A battery, 3750mAh capacity.

The sold battery does not have electronic protection against overcharging and deep discharge.

Precautions:
• to charge the battery, use high-quality chargers with a cut-off of not more than 4.2V.
• do not allow the battery to discharge below 2.5V
• do not discharge the battery with higher currents than those specified in the specification below
• do not charge the battery with higher current than specified in the specification below
• do not short circuit the battery
• do not carry with metal parts (risk of short circuit and burns)
• do not allow the battery to overheat above the temperatures provided by the manufacturer
• do not use batteries with damaged jackets / foil
• do not use batteries with a damaged or dented casing
• do not allow contact with water and other liquids
• do not solder plates or wires with a standard soldering iron