Weltool INR21-40P 4000mAh 21700 High Drain Li-ion Battery – 40A Discharge

The Weltool INR21-40P 21700 Li-ion Battery is engineered for high-performance flashlights and demanding electronic devices. With a massive 4000mAh capacity and 40A maximum discharge, this high-drain cell ensures stable, long-lasting power for your gear. Compact, powerful, and dependable, it’s the perfect choice for enthusiasts who demand reliability.

Key Features

• High Drain Performance: Up to 40A continuous discharge for powerful devices.

• Long Runtime: 4000mAh capacity (minimum 3950mAh) supports extended use.

• Reliable Cycling: Rated for 250 charge cycles with 60% capacity retention.

• Precision Built: Low internal resistance (≤12mΩ) for stable performance.

• Compact & Lightweight: Slim 21.3mm diameter, only 70g.

• Optimized for Flashlights: Perfect for high-output and tactical models.

Technical Specifications

Safety Warnings

• Do not immerse in water or expose to heat sources.

• Always use a professional charger with overcharge protection.

• Avoid over-discharge and reverse polarity connection.

• Do not pierce, disassemble, or short-circuit the battery.

What’s Included

• 1 x Weltool INR21-40P 21700 4000mAh High Drain Li-ion Battery