- Stock: In Stock
- Model: 83287
Samsung INR21700-40T – 21700 Li-ion Battery Cell (4000mAh, 3.6V, 35A)
The Samsung INR21700-40T is a high-drain 21700 Li-ion battery cell designed for demanding power applications and professional battery pack builds. It delivers a typical capacity of 4000mAh (minimum 3900mAh), 3.6V nominal voltage, and supports a 35A continuous discharge (up to 45A with thermal protection, depending on system design).
Why choose Samsung 40T?
- High-drain performance – 35A continuous discharge for power-hungry applications
- Strong capacity – 4000mAh typical for extended runtime
- 21700 form factor – popular format for modern high-power battery packs
- Pack-ready cell – ideal for OEM and professional integration
How it works
This is an unprotected Li-ion cell intended for controlled use in compatible devices or battery packs with a proper protection system. Follow standard Li-ion charging practices.
- Charging current (standard): 2.0A
- Max recommended charging current: 6.0A
- Max charge voltage: 4.2V
- Cut-off voltage: 2.5V
Safety and correct use
- Unprotected cell – use with a BMS/PCB protection system in battery packs
- Do not short-circuit, puncture, crush, or expose to heat
- Do not discharge below the specified cut-off voltage
- Use a quality charger with proper 4.2V cut-off
Important: High current use requires appropriate pack design, wiring, and thermal management.
Integration tips (B2B)
- Use matched cells (same batch where possible) for multi-cell packs
- Implement a quality BMS with balancing and overcurrent protection
- Design for heat dissipation when operating at high discharge currents
- Verify mechanical fit: 21.1 × 70.15 mm
Key points at a glance
- Model: Samsung INR21700-40T
- Type: 21700 Li-ion battery cell (unprotected)
- Nominal voltage: 3.6V
- Capacity: 4000mAh typical / 3900mAh minimum
- Continuous discharge: 35A (up to 45A with thermal protection)
- Charge voltage: 4.2V
- Cut-off voltage: 2.5V
- Weight: 70 g
Who is it for?
- Battery pack assemblers and integrators
- OEM/ODM manufacturers using high-drain 21700 cells
- High-power portable energy and industrial applications (with proper protection)
Order Samsung INR21700-40T
Choose a high-drain 21700 Li-ion cell combining strong capacity and 35A continuous discharge capability, designed for professional battery pack builds and demanding power applications.
Package contents: 1 × Samsung INR21700-40T 21700 Li-ion battery cell.
