Fenix ARB-L18-1600 Battery: Uses and Compatibility
By Fenix Flashlights | World Leader in Fenix® Sales | Fenix Lighting USA | Published: 2026-10-26
Category: Buying Guides
Discover what the Fenix ARB-L18-1600 rechargeable battery is used for, which lights it fits, and how it compares to other battery types.
Quick Answer
The Fenix ARB-L18-1600 is a 18350 rechargeable battery designed for compact Fenix lights that accept 18350 cells, offering a reliable power source with built-in protection.
Why Choose the ARB-L18-1600?
The ARB-L18-1600 is a 18350 Li-ion battery, smaller than the common 18650, making it ideal for compact flashlights and headlamps where space is limited. Its 1600mAh capacity provides a good balance between size and runtime for everyday carry lights.
The integrated protection circuit guards against short circuits, overcharging, over-discharging, and overheating, which is crucial for safe operation in high-drain devices.
Compared to disposable CR123A batteries, the ARB-L18-1600 is rechargeable, saving money and reducing waste over its ~500 charge cycle lifespan.
Compatibility Considerations
Not all Fenix lights use 18350 batteries. Check your light's manual or specifications to confirm it accepts 18350 cells. Some lights may also accept 18650, but the ARB-L18-1600 will not fit those due to its shorter length.
If you're unsure, compare the battery size with your current battery or consult the product page for your light model.
The ARB-L18-1600 is a protected cell, so it's safe to use in Fenix lights designed for 18350 batteries without worrying about over-discharge.
Fenix ARB-L18-1600 FAQ
- What lights use the ARB-L18-1600?
- Any Fenix flashlight or headlamp that is designed for 18350 batteries. Check the product specifications or manual for '18350' compatibility. Always verify compatibility before purchasing.
- How does it compare to an 18650 battery?
- The ARB-L18-1600 is shorter and has a smaller capacity (1600mAh vs typical 18650s like 3500mAh). It's for compact lights, not high-capacity long-run models. Choose 18650 for longer runtime if your light supports it.
- Is it safe to use in any Fenix light?
- Only use it in lights that explicitly accept 18350 batteries. The built-in protection adds safety, but using the wrong size can damage the light or battery. Use only in compatible devices.
- Can I replace CR123A batteries with the ARB-L18-1600?
- No, CR123A and 18350 have different dimensions and voltages. Only use the battery type specified for your light. Stick to the recommended battery type.
Product Facts
- Fenix ARB-L18-1600 Rechargeable Battery: The ARB-L18-1600 is a 18350 Li-ion rechargeable battery with 1600mAh capacity and an integrated protection circuit. This means it offers extended runtime for compact lights while protecting against common battery hazards, making it a safe, reliable choice.
Fenix ARB-L18-1600 Rechargeable Battery
