SUNWAYMAN AP-18 Li-ion 3.7v 3400mAh protected rechargeable type 18650 button top battery made of gold-plated copper

SUNWAYMAN 18650 3400 mAh 3.7V Li-Ion Battery
The SUNWAYMAN 18650 Lithium Ion Battery is the brand's first ever rechargeable battery. This potent Li-Ion cell delivers a sizable 3.7 Volts of power and sports an impressive capacity of 3400mAh, providing all the energy needed to power your high performance devices. Safety is as much a key feature of the battery as power, featuring PTC Over current Protection as well as a specialized pressure relief valve to prevent damage from sudden temperature increase. The 18650 is capable of being recharged up to 500 times before dropping to 80 percent of its initial capacity, allowing for extensive use before needing replacing.

Features
Button top made of gold-plated copper for superior conductivity and heat resistance
PTC Over current Protection prevents over-discharge that could damage the battery and its device
Pressure relief valve on negative end activates if there is a sudden temperature increase
Estimated Charge Cycles: 500 cycles
Certifications RoHS, CE, PICC

Specifications
Battery Size: 18650
Battery Chemistry: Lithium-Ion
Nominal Voltage: 3.7V
Nominal Capacity: 3400 mAh
Operating Temperature: -20°C to 60°C (-4°F to 140°F)
Size: Length 2.72" (69 mm) x Diameter 0.72" (18.4 mm)
Weight: 1.67 oz. (47.6 g)