Samsung INR21700-50S - 5000mAh max

The Samsung INR21700-50S combines high capacity with a high discharge current in the 21700 format. It is a benchmark cell for building and repairing e-bike batteries, e-scooters, power tools and high-power packs.

Key features

• 5000 mAh typical capacity (4800 mAh minimum)
• 25 A continuous discharge, up to 45 A with thermal cut-off at 80 °C
• Fast charging up to 6 A
• Samsung SDI branded cell, designed for electric motors and e-mobility
• 21700 format: more energy per cell than an 18650, so fewer welds per pack

Technical specifications

Model	Samsung INR21700-50S
Chemistry	Lithium-ion (INR)
Typical / minimum capacity	5000 mAh / 4800 mAh
Nominal voltage	3.6 V – 3.7 V
Charge cut-off voltage	4.2 V
Discharge cut-off voltage	2.5 V
Max. continuous discharge	25 A (without thermal cut-off)
Max. continuous discharge with thermal monitoring	45 A (cut-off at 80 °C)
Standard charge current	2.5 A
Max. charge current	6 A
Charging method	CC-CV
Positive terminal	Flat top
Protection circuit	No (bare cell)
Dimensions	Ø 21.15 mm × 70.52 mm
Weight	approx. 72 g

Applications

Rebuilding and manufacturing of e-bike batteries, electric scooters, cordless power tools, model making, high-power lights and storage systems with BMS.

Safety warning

Unprotected cell intended for assembling packs fitted with a BMS. To be used only by qualified persons. A short circuit or improper handling may cause a fire or an explosion. Do not use directly in a light or device without protection electronics. For a custom pack, our workshop can build the battery for you.