FENIX ARB-L18-2600U LI-ION BATTERY

The Fenix ARB-L18-2600U is a 2600 mAh 18650 lithium-ion battery for powering a compatible flashlight or headlamp in everyday use. The Micro-USB port is built into the battery, so you can charge a spare battery outside the light. It works well as a second battery if you need your light for shorter trips and can recharge the batteries between uses.

Suitable for

• Use as a spare battery for a compatible 18650 flashlight or headlamp

• Replacing the 2600U battery included with the Fenix PD35 V3.0

• Everyday use when a charging option is close at hand

• Charging with an existing Micro-USB cable or a suitable battery charger

Why choose the Fenix ARB-L18-2600U?

• 2600 mAh capacity and 50 g weight

• Micro-USB charging at up to 1 A

• Charging indicator helps you monitor the battery status

• Protection circuit helps protect the battery against short circuits, overcharging and deep discharge

Technical specifications

• Manufacturer: Fenix

• Model: ARB-L18-2600U

• Battery type: protected 18650 lithium-ion battery

• Capacity: 2600 mAh

• Nominal voltage: 3.6 V

• Charging port: Micro-USB

• Charging current via Micro-USB: 1 A

• Charging current in a separate charger: 1 A recommended, 2 A maximum

• Charging indicator: red while charging, blue or green when fully charged

• Charging cycles: 500 according to the manufacturer

• Length: 70 mm

• Diameter: 18.6 mm

• Weight: 50 g

Included

• 1 × Fenix ARB-L18-2600U battery

Frequently asked questions

What does the blue or green light on the ARB-L18-2600U battery mean?

A red light indicates that the battery is charging. The indicator may be blue or green when the battery is fully charged, depending on the version.

Can the 2600U be charged in an external battery charger?

Yes. The charger must support protected 18650 lithium-ion batteries and accommodate a 70 mm long cell.

When should I choose a 3400 mAh battery?

If you often use your light for long periods, a compatible 3400 mAh battery provides greater nominal capacity. Choose the 3400U for Micro-USB or the 3400U V3.0 for USB-C.

When is the Fenix ARB-L18-2600U the right choice?

The 2600U is suitable if you are looking for a second battery for shorter trips and can charge it between uses. For longer runtime with the same light, consider the 3400U model with a higher nominal capacity, provided it is compatible with your light.

Our recommendations

If you mainly keep the battery as a spare, try it from time to time in the light you intend to use it with. Before a trip, check its charge and place the spare battery in a suitable battery case. If you also use the light at home or at work, designate a place to keep the charged battery and charging cable. That way, both will be close at hand when needed.

Compare batteries based on how long your light runs at your usual brightness level. Runtimes at the maximum and a lower setting can differ considerably with the same battery. If 2600 mAh is enough for your usual trip, a second battery of the same type can be a practical spare. For longer continuous use, compare it with the 3400 mAh model.

18650 spare battery with Micro-USB charging

The Fenix ARB-L18-2600U provides a compatible light with a replaceable power source that you can charge directly via Micro-USB. The product code is FX-ARB-L18-2600U.