VOLTCRAFT Special Battery 21700 Flat-Top Li-Ion 3.7 V 5000 mAh 1 pc (VC-17666000)

High-drain devices like flashlights, power tools, and e-cigarettes demand a battery that delivers consistent power without fading. The VOLTCRAFT VC-17666000 21700 lithium-ion cell provides a robust 5000 mAh capacity and 10 A continuous discharge, ensuring your equipment runs longer between charges. Its flat-top design fits devices with flat contacts, and the built-in protection circuit guards against overcharge, over-discharge, and short circuits.

Who is it for

This battery is ideal for DIY enthusiasts, vapers, and professionals who rely on high-performance 21700-powered gear. Whether you're building a battery pack, upgrading a flashlight, or powering a portable tool, this cell offers the reliability and capacity you need.

Main features

• High capacity: 5000 mAh for extended runtime
• Flat-top terminal for compatibility with flat-contact devices
• 10 A max continuous discharge for power-hungry applications
• Built-in protection against overcharge, over-discharge, and short circuit
• Long cycle life: over 500 charge/discharge cycles
• Wide operating temperature range: -20 to +60 °C

Specifications

• Battery type: Lithium-Ion (Li-Ion)
• Battery size: 21700
• Nominal voltage: 3.7 V
• Capacity: 5000 mAh
• Energy rating: 18.5 Wh
• Terminal type: Flat-top
• Max continuous discharge current: 10 A
• Max charging current: 2.5 A
• Charging voltage: 4.2 V
• Minimum discharge voltage: 2.5 V
• Cycle life: >500 cycles (to 80% capacity)
• Operating temperature range: -20 to +60 °C
• Charging temperature range: 0 to +45 °C
• Rechargeable: Yes
• Quantity per pack: 1

Tips

Always use a compatible charger designed for 21700 Li-Ion cells and follow the recommended charging parameters. Store the battery in a cool, dry place at partial charge (around 40-60%) when not in use for extended periods. Do not expose to extreme temperatures or moisture.