Vapcell M52 21700 5200mAh 15A INR Flat Top Rechargeable Battery

The Vapcell M52 is a maximum-runtime 21700: 5200mAh typical, 5000mAh minimum, with a 15A continuous discharge rating and 25A for short 5-second bursts. It's the cell to pick when you want the longest possible time between charges in a 21700 flashlight or headlamp and your light draws 15A or less on its highest mode. Rated for 1000+ recharge cycles.

• 21700 flat top, unprotected INR lithium-ion, gold/black wrap
• 5200mAh typical / 5000mAh minimum (0.2C)
• 15A continuous, 25A max (5-second pulse)
• 3.6V nominal, 4.20V full charge, 2.5V cut-off
• Approx. 20mΩ internal resistance (AC 1kHz)
• Standard charge 1.5A, quick charge up to 3A
• Approx. 21.2 × 71.0mm, 72g
• 1000+ cycle life

Independent testing: Vapcell's own published discharge curves show roughly 5085mAh delivered at a 15A continuous load and 5105mAh at 1A, so the rating holds up under real current.

Fit check: Flat top and unprotected. At 71mm it is a normal-length 21700 and fits most Convoy, Emisar, Sofirn and Wurkkos 21700 hosts. Not a match for devices that need a button top or a protected cell. If your light pulls more than 15A on turbo, the K40 is the better choice.

What's included: 1 × Vapcell M52 21700 5200mAh 15A INR Flat Top Rechargeable Battery. Ships from Pennsylvania.

Unprotected lithium-ion cell. Use only in devices with their own protection circuitry, charge with a quality Li-ion charger, never exceed the continuous discharge rating, and keep the wrap and top insulator ring in perfect condition. Not for use in devices that require a button-top or protected cell.