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Meet the Fenix 5000mAh 21700 Battery ARB-L21-5000U, your ticket to uninterrupted adventure and everyday confidence. Whether you're scaling a remote peak, livestreaming a midnight event, or simply powering critical gear at home, this powerhouse cell refuses to quit when you can't afford downtime. With an industry-leading 5000mAh capacity, it delivers marathon-level runtimes that outpace standard cellsso you'll spend more time exploring and less time hunting for outlets.
Every inch of the ARB-L21-5000U is crafted for fearless performance. Built-in multi-protection circuitry shields against overcharge, over-discharge, and short circuits, giving you peace of mind whether you're charging at home or in the backcountry. Its tough outer wrap stands up to abrasion, moisture, and shock, ready for jostles in a backpack, glovebox, or jacket pocket. Rain or shine, heat or freeze, this battery thrives in extreme temperaturesfrom 20°C arctic winds to 60°C desert sunensuring your flashlight, headlamp, or high-drain device functions flawlessly at every turn.
But endurance and safety aren't the only highlights. The ARB-L21-5000U delivers rock-steady voltage, keeping beams bright and electronics humming smoothly until the very last drop of juice. Swap in this universal 21700 cell and instantly boost runtime without sacrificing performance or reliability. It's the go-to choice for outdoor enthusiasts filming sunrises, professionals relying on critical tools, and everyday users demanding more from their devices.
Say farewell to battery anxiety. The Fenix 5000mAh 21700 Battery gives you the freedom to push boundaries and trust your gear, no matter where life takes you. Power through back-to-back tasks, all-night shoots, or weekend escapes with unwavering confidenceand remember: with Fenix, your adventures never have to stop.
Massive 5000mAh capacity for unbeatable runtimes
Advanced multi-protection circuitry for total safety
Rugged, weather-resistant wrap endures harsh conditions
Consistent voltage output ensures peak performance
Wide 21700 compatibility boosts diverse devices
Operates flawlessly from 20°C to 60°C
Chemistry: High-performance lithium-ion
Capacity: 5000mAh (deep-discharge cycles)
Size: 21mm diameter x 70mm length (21700)
Nominal Voltage: 3.6V for stable delivery
Protection: Overcharge, over-discharge, short-circuit
Operating Temperature: 20°C to 60°C continuous use
Weight: 70g lightweight yet rugged
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