TESIYI IMR 21700 High-drain Li-ion Battery 40A 4000mAh

TESIYI IMR 21700 High-drain Li-ion Battery 40A 4000mAh

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The 4000mAh TESIYI 21700 Li-ion Battery is a high performance IMR 21700 battery with 1330mAh standard charge and 4000mAh capacity. The TESIYI 21700 battery is widely used for powering vaping mods and other electrical devices. It also has been tested extensively and can handle some serious current in a long period.


Size: 21700 (21.1mm diameter x 70.15mm long)
Type: Li-ion IMR (Rechargeable)
Rated Capacity: 4000mAh 
Max Discharge Current : 9600mAh(not for cycle life)
Max Discharge Current (Pulse): 35A for 10s, 25A for 30s, 18A for 60s (ambient temperature 23℃)
Voltage: 4.2V
Rated Storage temperature: 20-55℃

Batteries are sold as a single unit, not a pair as pictured.

NOTE: Lithium batteries can not be sent Express Post unless installed in a device. Loose batteries can only be shipped by Road, which will take longer than normal post.