XTAR 21700 5000mAh 3.6V Li-ion Battery (Unprotected Flat Top)

With a massive 5000 mAh capacity and 15 A continuous discharge, this XTAR 21700 cell delivers reliable, long-lasting power for high-drain devices. Its 18 Wh energy rating and low internal resistance ensure efficient performance across a wide range of applications.

Overview

The XTAR 21700-5000 is a lithium-ion rechargeable battery in the 21700 form factor. It features a nominal voltage of 3.6 V and a typical capacity of 5000 mAh, making it suitable for flashlights, power tools, e-bikes, and other demanding electronics. The cell is unprotected with a flat top terminal, allowing use in devices with built-in protection circuits or battery packs.

What stands out

• High capacity: 5000 mAh for extended runtime.
• 15 A max continuous discharge, 30 A pulse for short bursts.
• Low internal resistance (< 20 mΩ) for efficient power delivery.
• Wide operating temperature range: -20°C to 60°C (discharge).
• Long cycle life: > 500 cycles to 80% capacity.
• CE and RoHS certified for safety and environmental compliance.

Technical details

• Battery type: Lithium-ion (Li-ion)
• Form factor: 21700
• Nominal voltage: 3.6 V
• Capacity: 5000 mAh
• Energy: 18 Wh
• Max continuous discharge current: 15 A
• Max pulse discharge current: 30 A (1-2 seconds)
• Standard charging current: 2.5 A (0.5C)
• Max charging voltage: 4.2 V
• Discharge cut-off voltage: 2.5 V
• Internal resistance: < 20 mΩ
• Cycle life: > 500 cycles (to 80% capacity)
• Protection circuit: Unprotected
• Terminal type: Flat top
• Operating temperature (discharge): -20°C to 60°C
• Operating temperature (charge): 0°C to 45°C
• Self-discharge rate: < 5% per month
• Certifications: CE, RoHS

Our verdict

The XTAR 21700-5000 is a high-performance cell that balances capacity and discharge capability, ideal for users needing reliable power in compact devices. Its unprotected flat top design offers flexibility for pack builders and devices with built-in protection.