Power your high-performance flashlights reliably with the Wurkkos 21700 5000mAh flat rechargeable lithium-ion battery – a high-capacity flat-top cell sold as 1 battery per pack for targeted upgrades or spares. This battery delivers a standard capacity of 5000mAh at 3.6V, providing extended runtime and consistent power for demanding LED torches and compatible devices.

Featuring a robust flat-top design, it ensures excellent contact and compatibility in flashlights that accept unprotected or flat-top 21700 cells. Built with advanced safety features including a microporous barrier and nickel-plated stainless steel protectors, it offers added peace of mind during use and charging. The rechargeable 3C cell design emphasizes durability, longevity, and eco-friendly performance over disposable alternatives.

Key specifications:

• Battery type: 21700
• Capacity: 5000mAh (standard)
• Voltage: 3.6V
• Minimum voltage: 2.50V
• Maximum voltage: 4.20V ± 0.03V
• Diameter: 21.7 mm ± 0.2 mm
• Length: 70.9 mm ± 0.2 mm
• Weight: 72 g ± 4 g
• Standard charge current: 0.2C (1000mA)
• Maximum charge current: 0.7C (3500mA)
• Maximum discharge current: 2C (10000mA / 10A continuous; can handle up to 15A max)
• Initial internal impedance: ≤ 30mΩ

This high-capacity 5000mAh 21700 battery excels in applications requiring long-lasting illumination, such as everyday carry lights, outdoor adventures, or emergency preparedness. Its balanced discharge capability supports stable performance in moderate to higher-drain scenarios while prioritizing safety and reliability.

Important safety and usage notes: Charge only with a compatible lithium-ion charger using the CC-CV method (to 4.20V ± 0.03V) and do not exceed recommended currents or temperatures. Avoid short-circuiting, puncturing, crushing, over-discharging below 2.50V, or exposing to water, fire, or extreme conditions. Use in devices with appropriate protection circuits (essential for higher-discharge setups). Store partially charged in a cool, dry place. Follow proper charging practices to maintain lifespan.

Note: This listing is for 1 battery per pack – ideal for single replacements or building custom setups.

Upgrade your lighting gear with the Wurkkos 21700 5000mAh flat – exceptional capacity, solid safety features, and dependable power in every single battery!