3.7V 2500mAh 18650 Li-Ion Battery 5C
Button Type: Flat Top
Size:  Flat Head 18*65mm
Nominal Voltage: 3.7V (Fully charged voltage 4.2V, discharge cut-off voltage 2.75V)
Capacity: :2600mAH True Capacity
Internal resistance: <20mΩ.
Power: 5C
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