Key Features

3700mAh Capacity: Provides long-lasting power in the 21700 lithium-ion format.
Flat-Top Terminal: Designed for devices and battery packs that require flat-top cells.
Consistent 3.7V Output: Reliable nominal voltage with a 4.2V maximum charge level.
2.5V Cut-Off Voltage: Helps support proper discharge limits in compatible devices.
Rechargeable Lithium-Ion Cell: Built for repeated charging and long-term use.

Overview

The Efest IMR 21700 3700mAh rechargeable battery offers dependable performance and extended runtime in a modern 21700 lithium-ion size. Featuring a flat-top design and unprotected construction, this cell is intended for devices specifically engineered to operate with 21700 batteries. It delivers stable power output and is well-suited for users who need reliable energy in high-capacity applications.

Applications / Uses

21700-compatible flashlights
Portable power tools and equipment
DIY electronics and custom battery assemblies
Bench testing and evaluation projects
Replacement batteries for compatible lithium-ion devices

Specifications

Manufacturer:	Efest
Model:	IMR21700V1
Size:	21700
Positive Terminal:	Flat Top
Nominal Capacity:	3700mAh
Nominal Voltage:	3.7V
Maximum Voltage:	4.2V
Continuous Discharge Rating (Max):	10A
Cut-off Voltage:	2.5V
Protected:	No
Rechargeable:	Yes
Approx. Dimensions:	21.5mm x 70.4mm
Approx. Weight:	73.12g

Efest IMR 21700 3700mAh Flat Top Battery

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