FENIX ARB-L18-3400U LI-ION BATTERY

Fenix ARB-L18-3400U is a 3400 mAh 18650 battery for users who have a Micro-USB cable in their charging kit. You can charge it separately from the light using the battery's own charging port. You can also use a compatible lithium-ion battery charger if you have one.

Suitable for use as

• A replacement battery for a compatible 18650 light, rechargeable via Micro-USB

• A spare battery on longer hikes or for outdoor work in the evening

• A battery for users who already have a Micro-USB charging cable or a suitable battery charger

Why choose Fenix ARB-L18-3400U?

• 3400 mAh capacity provides 800 mAh more nominal capacity than the 2600U model

• Micro-USB port allows the battery to be charged without a separate battery charger

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

• Indicator light helps you see when charging is complete

Technical specifications

• Manufacturer: Fenix

• Model: ARB-L18-3400U

• Battery type: protected 18650 lithium-ion battery

• Capacity: 3400 mAh

• Nominal voltage: 3.6 V

• Charging port: Micro-USB

• Charging current via Micro-USB: 1 A

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

• Charging indicator: red while charging, blue when fully charged according to Jahipaun product information

• Charging cycles: 500 according to the manufacturer

• Length: 70 mm

• Diameter: 18.6 mm

• Weight: 50 g

Included

• 1 × Fenix ARB-L18-3400U battery

Frequently asked questions

Which cable is used to charge the Fenix ARB-L18-3400U battery?

This model uses a Micro-USB charging cable. If you want to connect a USB-C cable directly to the battery, choose the ARB-L18-3400U V3.0.

How do I check whether the battery is compatible with my 18650 light?

Check the light's manual and compare it with the old battery. This model is 70 mm long and 18.6 mm in diameter and is suitable for lights that support a protected 3.6 V lithium-ion battery of these dimensions.

How much does the capacity differ from the Fenix ARB-L18-2600U battery?

The 3400U has a nominal capacity that is 800 mAh higher. Actual runtime depends on the light, the light mode and the conditions of use.

When is the Fenix ARB-L18-3400U the right choice?

Choose the 3400U if you want a Micro-USB rechargeable 18650 battery and prefer a higher capacity than the 2600U model. If your charging equipment has already switched to USB-C, it is worth comparing the V3.0 version with the same capacity.

We recommend

When ordering, check the charging port type as well as the model designation. The ARB-L18-3400U and ARB-L18-3400U V3.0 have the same 3400 mAh capacity, so checking the port will help you choose a battery compatible with your existing cable. If you charge the battery in a separate charger, make sure the charger supports both lithium-ion chemistry and the battery's 70 mm length.

If you mainly use your light for evening walks or work, test how long a fully charged battery lasts in your usual light mode before a longer trip. Pack a spare battery and a Micro-USB cable with your other charging equipment. Keep the battery in a separate battery case so that keys or other metal objects cannot come into contact with the terminals.

3400 mAh spare battery for Micro-USB charging

Fenix ARB-L18-3400U is suitable for a compatible 18650 light if you want to continue using Micro-USB charging equipment. The product code for this version is FX-ARB-L18-3400U.