Fenix ARB-L18-3500U
(70 reviews)
With its built-in circuit allowing it to be recharged directly via a micro-USB port, this Fenix 18650 battery is an excellent choice.
Characteristics
- Capacity / Voltage: 3500mAh / 3.6V
- Rechargeable: Yes, by USB (Lithium)
- Pack size: Single unit
- Fenix quality, practical design, protection circuit
Detailed overview
Fenix, a brand famous for its ultra-powerful, top-quality flashlights, delivers here an innovative and excellently built battery. Indeed, it has a micro-USB port, which lets you charge it anywhere, using any device with a USB port (computer, phone charger, power bank...).
Powerful, it has a capacity of 3500mAh, making it the ideal battery for high-power devices, such as flashlights (for which it was designed). Rated for 500 charge cycles, featuring an LED that indicates the charge level, it has numerous protections (against short-circuits, overheating, overcharging, deep discharge). All of this makes it one of the most reliable and best-protected batteries in the world.
Note that this comes at the cost of the battery's total length, which is 70mm (with an 18.6mm diameter): check before buying whether your devices are compatible with a button-top battery slightly longer than the standards of this format.
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Page last updated on 03/07/2026