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Samsung INR21700-40T Cell Specifications
Warning: The information in this thread was obtained from various sources on the Internet, including any datasheets linked below, and is provided for reference only. It is not guaranteed to be accurate. To prevent fire or personal injury, never charge or discharge a cell before verifying the information yourself using the original specifications sheet provided by the manufacturer.

Capacity:4000mAh Rated
Voltage:3.60V Nominal
Charging:4.20V Maximum
2000mA Standard
6000mA Maximum
Discharging:2.50V Cutoff
800mA Standard
45000mA Maximum
Description:Purple (Light) Cell Wrapper
White Insulator Ring
21700 Form Factor

Data References:

These kind of batteries are used in Bosch 4A 18V batteries and Kobalt 2A 24V battery packs for professional tools, and there's 2 sizes of these batteries. Just as an additional info. I don't know if i can post a link of a yt vid here but there is one about a teardown finding these in them.

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