Key Features

• Extended Runtime: 4000mAh capacity supports longer operating cycles.
• Exceptional Power Output: Up to 70A continuous discharge for demanding applications.
• Stable INR Chemistry: Designed for consistent output and thermal reliability.
• Industrial-Grade Build: Reinforced steel shell with integrated safety features.
• System Integration Ready: Ideal for professionally engineered battery packs.

Overview

The Reliance RS40 is engineered for applications where high current delivery and reliability are essential. Offering a 4000mAh nominal capacity and an industry-leading 70A continuous discharge rating, this 21700 lithium-ion cell is purpose-built for power-demanding systems. Its flat top, unprotected design allows seamless integration into advanced battery assemblies while maintaining consistent and dependable performance.

Applications / Uses

• Electric mobility platforms
• Power tools and industrial machinery
• High-output battery pack systems
• Commercial and industrial electronics
• Energy storage and power delivery solutions

Specifications

Manufacturer	Reliance
Model	RS40
Battery Size	21700
Positive Terminal	Flat Top
Nominal Capacity	4000mAh
Minimum Capacity	3900mAh
Max Continuous Discharge	70A
Nominal Voltage	3.6V
Maximum Voltage	4.2V
Discharge Cut-off Voltage	2.5V
Protection	No (Unprotected)
Standard Charge Current	2500mA
Cycle Life	≥80% capacity after 500 cycles
Operating Temperature	-20°C to 60°C (Discharge), 0°C to 45°C (Charge)
Rechargeable	Yes
Approx. Dimensions	21.55mm x 70.3mm
Approx. Weight	65g

Reliance RS40 21700 4000mAh 70A Battery Datasheet