LG INR21700 M50LT 3.6V 5000mAh Lithium-Ion Rechargeable Cell

The LG Chem INR21700-M50LT is a premium high-capacity 21700 lithium-ion cell designed for demanding energy storage applications. With an industry-leading 5000mAh capacity at 3.6V nominal, the M50LT variant is optimised for low-temperature performance — delivering reliable power even in sub-zero environments where standard cells falter. Built on LG's proven NMC chemistry, it offers an exceptional combination of energy density, cycle durability, and thermal resilience.

Key Specifications

• Model: INR21700-M50LT
• Chemistry: Lithium-Ion NMC (INR)
• Nominal Voltage: 3.6V
• Capacity: 5000mAh (typical)
• Maximum Continuous Discharge: 10A (2C)
• Charge Voltage: 4.2V (max)
• Cut-off Voltage: 2.5V
• Cell Size: 21700 (21mm × 70mm)
• Low-Temperature Performance: Optimised for operation down to -40°C
• Operating Temperature: -40°C to +60°C (discharge); 0°C to +45°C (charge)
• Cycle Life: 500+ cycles to 80% capacity
• Weight: ~68g
• Flat Top (No Button Top)

Typical Applications

• Electric vehicles (EV) and e-bike battery packs
• High-capacity power banks and portable energy storage
• Cold-environment equipment (outdoor, military, industrial)
• Robotics and autonomous systems
• Solar energy storage and off-grid systems
• UPS and backup power systems
• DIY high-capacity battery pack builds

Why the LG M50LT?

The 21700 form factor offers ~50% more volume than the standard 18650, and the M50LT maximises that advantage with a full 5000mAh capacity. The "LT" (Low Temperature) designation sets it apart — engineered to maintain discharge performance in freezing conditions, making it the go-to cell for outdoor, cold-chain, and industrial deployments. Fewer cells needed per pack means simpler BMS design, lower assembly cost, and a lighter overall system.

Important: This is a bare, unprotected lithium-ion cell. Always use with a suitable Battery Management System (BMS) or protection circuit. Do not short-circuit, overcharge, over-discharge, or expose to temperatures outside the specified range. Handle and dispose of in accordance with local regulations.