XTAR 21700 Li-Ion 3.7V 4900mAh Protected Battery (1 Piece)

The XTAR 21700 Li-Ion battery delivers high capacity and reliable performance for demanding devices. With a nominal voltage of 3.7V and 4900mAh capacity, this protected cell is ideal for flashlights, power tools, and other high-drain applications.

Advantages

Built-in protection circuit prevents overcharge, over-discharge, and short circuits. High energy density of 18.13Wh ensures long runtime. Flat top design compatible with most 21700 devices.

Suitable for

• High-performance flashlights
• Portable power stations
• DIY electronics projects
• Replacement for 21700 battery packs

Key specifications

• Battery Type: Lithium-ion (Li-Ion)
• Size: 21700
• Nominal Voltage: 3.7V
• Capacity: 4900 mAh
• Energy: 18.13 Wh
• Protection Circuit: Yes (PCB Protected)
• Max Continuous Discharge Current: 10A
• Max Charging Current: 2.5A
• Charging Voltage: 4.2V
• Cut-off Voltage (Discharge): 2.5V
• Terminal Type: Flat Top
• Rechargeable: Yes
• Cycle Life: >500 cycles (to 80% capacity)
• Operating Temperature (Discharge): -20°C to 60°C
• Operating Temperature (Charge): 0°C to 45°C
• Internal Resistance: <50 mΩ
• Quantity per Pack: 1
• Certifications: CE, RoHS

Recommendations

Always use a compatible charger designed for Li-Ion batteries. Do not exceed maximum discharge current. Store in a cool, dry place.