Description

RELIANCE RS50 21700 HIGH DRAIN BATTERY

The Reliance RS50 21700 is a premium high-drain lithium-ion cell built for users who need outstanding capacity and strong, consistent power delivery. Rated at 5000mAh, the RS50 provides excellent runtime while maintaining low internal resistance for stable output under heavy load.

Engineered for performance-driven applications, this cell is suitable for devices that demand high current, long-lasting energy delivery and dependable safety features. Its robust build quality and INR chemistry help ensure efficient operation, minimal voltage sag and reliable performance throughout the discharge cycle.

The RS50 is a flat-top, unprotected cell — perfect for devices designed specifically for removable high-drain 21700 batteries. Whether you need long-lasting power for high-output mods or consistent performance in tools, lights or custom battery packs, the Reliance RS50 is a dependable choice for users who value both capacity and power.

Battery Mooch Test Results:

Specifications

• Battery Type: 21700 high-drain lithium-ionChemistry: INR
• Nominal Capacity: 5000mAh (approx.)
• Nominal Voltage: 3.6V–3.7V
• Max Continuous Discharge: High-drain capability (device-dependent)
• Typical Dimensions: Approx. 21.3mm × 70.3mm
• Top Style: Flat-top
• Protection: Unprotected cell
• Application: High-drain mods, tools, e-mobility, flashlights, power packs, electronics requiring strong continuous output

Battery Safety Information

• Use only in devices designed for 21700 flat-top cells.
• Always charge externally in a quality charger.
• Never carry loose cells — always store and transport in a protective case.
• Do not exceed the battery’s safe operating limits.
• Inspect wraps regularly and replace damaged wraps immediately.

Misuse of these products can cause harm, this product is only recommended for use by experienced users with knowledge of Ohm’s Law.