2 Pack Olight 3400mah Protected Rechargeable Li-ion Batteries -Model18650 - Designed for M22 M21x M20s S20 M18 Sr51 Tm26 Tm15 Tm11 P12 Srt7 Srt6 P25 Ec25 Tk75 Pd35 Pd32 Tk22;

Features

500 Charge/discharge cycles

Triple over-heat protection

Over-discharge protection

High capacity at low temperature (-10°C)

Higher capacity and lower weight than other

rechargeable batteries

Higher energy density

Specifications:

Battery Size: 18650

Chemistry: Li-ion

Voltage: 3.7V

Capacity: 3400mAh

Charge current: 1700mA (0.5C)

Maximum charge current: 3600mA (1C)

Maximum discharge current: 4200mA

Diameter: 0.7" (18.6mm)

Height: 2.7" (69.5mm)

Weight: 1.7 oz (49g)