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INR21700-50E is a lithium-ion cell in the 21700 form factor from Samsung SDI, designed for maximum capacity and long runtime rather than extreme discharge currents.
It offers a capacity of 5000 mAh and is rated for a discharge current of up to ~10 A, making it optimal for devices with moderate power consumption:
— portable electronics
— flashlights
— battery packs focused on long autonomy
— power bank solutions
— light electric mobility with an emphasis on range
Unlike models such as the 40T, the 50E is not a high-power cell — its main purpose is not maximum output, but the highest possible energy capacity in the 21700 format.
Interesting fact: the INR21700-50E was among the first mass-produced 21700 cells to demonstrate that this format is suitable not only for high-power applications (tools, e-mobility), but also for high-energy use cases. Cells like this helped establish 21700 as a universal format — not only powerful, but also highly energy-dense.
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