21700 Rechargeable Battery Specifications:

• Nominal Capacity: 5000 mAh 
• Nominal Voltage: 3.6V / 3.7V
• Low Discharge Voltage Limit: 2.5V
• Max Continuous Discharging Current: 10A
• Dimensions: 74.8mm x 21.49mm (+/- 0.3mm)
• Weight (max): 70g
• Positive Terminal: Welded Button Top
• Protected: Yes, Advanced (welded) Electronic Protection
• Recommended charging current: 1A - 2A
• Charging Algorithm: CC/CV
• Type / Size: 21700 Protected
• Chemical Composition: Li-ion (Lithium-Ion) Hybrid / High Drain

This Powerful Protected 21700 battery is the best choice for high-performance LED Flashlights. 

It can be utilized with any application able to run on Protected button top 21700 size batteries / 74.8mm x 21.49mm (+/- 0.3mm).

Protection:

Overcharge (Activated at 4.35V)
Over-discharge (Activated at 2.4V-2.5V)
Over-current (Activated at 10A-12A)
Dual Short circuit protection.

How long does a 21700 battery last?

• Li-ion battery life expectancy: on average 21700 battery will last 3-6 Years
• Number of charge/discharge cycles: between 300 and 500 cycles

21700 rechargeable battery will last much longer if it is not under harsh environments/extreme conditions (some of them are):

• High Humidity
• High Temperatures
• High Constant Current Load

***Please note, price is listed for ONE 21700 battery.