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The Fenix ARB-L21 is a high-capacity 21700 Li-ion rechargeable battery designed for extended runtimes and optimal performance. This battery powers high-output flashlights, such as the LR35R, by maintaining higher voltage levels over longer durations. It features a protection circuit to prevent short circuits, overcharge, and overheating, along with pressure relief vents to mitigate the risk of explosions. With a capacity of up to 4000mAh and 500 charging cycles, it ensures reliability and safety for high-performance devices.
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