TCBEST Li-ion D R20 4900mAh USB-C Rechargeable Battery

The TCBEST Li-ion D R20 4900mAh USB-C Rechargeable Battery is a high-capacity, rechargeable power solution designed for devices requiring D (R20) size batteries. With a built-in USB-C charging port, it offers convenient and fast recharging, eliminating the need for a separate charger. This battery is ideal for high-drain devices such as flashlights, radios, toys, and medical equipment.

Advantages

High capacity of 4900mAh ensures long-lasting power. USB-C charging port provides universal compatibility and easy recharging. Li-ion chemistry offers stable voltage and up to 1000 charge cycles, reducing waste and cost. Built-in protection circuits safeguard against overcharge, over-discharge, short circuit, and overcurrent. LED indicator shows charging status.

Suitable for

• Flashlights and lanterns
• Portable radios and boomboxes
• Toys and remote controls
• Medical devices (e.g., blood pressure monitors)
• Emergency backup power

Key specifications

• Battery Chemistry: Lithium-Ion (Li-ion)
• Battery Size: D (R20)
• Capacity: 4900 mAh
• Nominal Voltage: 3.7V
• Energy: 18.13 Wh
• Charging Interface: USB-C (Type-C)
• Input Voltage: 5V DC
• Cycle Life: Up to 1000 cycles
• Protection: Overcharge, Over-discharge, Short Circuit, Overcurrent
• LED Charging Indicator: Yes
• Self-Discharge: Low
• Operating Temperature: -20°C to 60°C
• Storage Temperature: -20°C to 45°C
• Certifications: CE, RoHS
• Quantity: 1 Battery

Recommendations

For best performance, charge the battery fully before first use. Use a standard USB-C charger (5V/1A or higher). Do not expose to extreme temperatures or moisture. Recycle responsibly at end of life.