Samsung 50E 21700 (5000mAh)
The benchmark high-capacity 21700 cell: the Samsung 50E offers 5000mAh in a compact format, ideal for powerful torches, scooters and DIY batteries.
Characteristics
- Format: 21700 (INR21700-50E)
- Capacity: 5000 mAh
- Continuous discharge: About 9.8A
- Nominal voltage: 3.6V (lithium-ion)
- 5000mAh, the best capacity/price ratio in 21700
Detailed overview: Samsung INR21700-50E 5000mAh lithium cell
The Samsung 50E cell (full reference INR21700-50E) is a rechargeable lithium-ion cell in the 21700 format, a cylindrical format slightly larger than the classic 18650 (21 mm diameter, 70 mm length). It is a safe bet in the 21700 format, renowned for its excellent capacity/price ratio.
It offers a capacity of 5000 mAh, among the highest in the format, paired with a continuous discharge current of about 9.8A. This balance makes it a versatile cell: it favours runtime while delivering enough power for many uses. Its nominal voltage is 3.6V, standard for a lithium-ion cell, and it recharges on a charger suited to 21700 cells.
You find it in powerful torches, electric scooters and bikes, DIY battery packs (assembled by enthusiasts), portable tools and electronic mods. Its high capacity makes it a prime cell to maximise the runtime of a device or a pack.
Important: this is a bare, unprotected cell, with no built-in protection circuit. It is therefore reserved for experienced users, who know how to handle and integrate it safely (never short it, carry it in a case, do not discharge it below its minimum voltage, use a suitable charger). Misused, a bare lithium cell can be dangerous. For those who master these precautions, the Samsung 50E is an excellent high-capacity 21700 cell.
EAN: 4053199966097
Frequently asked questions: Samsung INR21700-50E 5000mAh lithium cell
The 21700 is slightly larger than the 18650 (21 mm diameter, 70 mm long versus 18 x 65 mm). This larger format allows a higher capacity, up to 5000mAh for the Samsung 50E, versus about 3500mAh for the best 18650 cells.
No, it is a bare, unprotected cell, with no built-in protection circuit. It is reserved for experienced users who know how to handle and integrate it safely, with a suitable charger and cell holder.
It is used in powerful torches, electric scooters and bikes, DIY battery packs, some portable tools and electronic mods, wherever you want high runtime in a compact format.
You must use a charger designed for 21700 lithium-ion cells, never discharge it below its minimum voltage, avoid short circuits and carry it in a case. These precautions are essential for a bare, unprotected cell.
Other products in the "21700 batteries" category
Keeppower 21700 5000mAh
£16.32
A high-capacity 21700 cell from a brand known for its built-in protection circuits: the Keeppower 5000mAh targets powerful torches and DIY packs.
Klarus 21GT-50 5000mAh
£22.00 (4)
The 21GT-50 is Klarus's high-capacity 21700 battery: 5000mAh, 15A continuous discharge and a built-in protection circuit for the most demanding torches and devices.
LG M50T 21700 (5000mAh)
5000mAh in a compact 21700 format: the LG M50T targets maximum runtime for DIY battery packs, e-bikes and long-duration torches.
Molicel P42A 21700 (4200mAh)
See price (11)
The 21700 sibling of the 18650 benchmark: 4200mAh and 45A continuous, built for cordless tools, ultra-powerful flashlights and demanding electronics.
Published on 12/07/2026, updated on 15/08/2026