3.7V 1200mAh 18650 Li-Ion Battery
Button Type: Button / Flat Top
Size: Pointed 18*67mm, Flat Head 18*65mm
Nominal Voltage: 3.7V (Fully charged voltage 4.2V, discharge cut-off voltage 2.75V)
Output current: ≤2A
Internal resistance: <50mΩ.
Weight: ~45g
Service life: the capacity drops 30% after 1000 cycles.
Applications: Bright flashlight, headlight, small fan, radio, singer and so on. Not suitable for battery packs, power banks

Safety: no explosion, no combustion, environmental protection, non-toxic, non-polluting
Durable: long life, more than 1000 cycles of charging
Stable: 100% discharge efficiency at 65°C