- Product Code: 6942870311104
- EAN: 6942870311104
Fenix ARB-L18-3400U V3 18650 is a high-capacity 3400 mAh Li-ion battery with convenient USB-C charging functionality. The battery can be charged directly with a USB-C cable without a separate charger, or alternatively with an external charger suitable for Li-ion batteries. Fourfold protection mechanisms and a wide operating temperature range of -20 °C to +60 °C support safe and reliable use.
The battery has a nominal voltage of 3.6 V and an energy content of 12.24 Wh. The USB charging current is 1.5 A, while the recommended charging current when using an external charger is 700 mA and the maximum charging current is 3.3 A. The USB-C connector provides flexible charging options, but the USB-C cable must be purchased separately.
Charging indicator lights at the positive terminal clearly show the charging progress: a red light indicates charging, while a blue light indicates that the battery is ready for use. Overcharge, over-discharge, short-circuit and overheating protection help prevent the most common battery-related hazards.
The steel protective structure helps protect the battery against impact-related short circuits and other hazards. The battery operating temperature range is -20 °C to +60 °C, and the charging temperature range is 10 °C to +45 °C. The reinforced construction and multiple electrical protection features are designed for demanding use.
The battery diameter is 18.6 mm, length 70 mm and weight 50 g. The battery is longer than a standard 18650 battery, so compatibility of the 70 mm length with the device being used must be checked before purchase.
Fenix ARB-L18-3400U V3 18650 - Features:
- Battery type: rechargeable Li-ion battery
- Size: 18650
- Nominal voltage: 3.6 V
- Capacity: 3400 mAh
- Energy content: 12.24 Wh
- Charging method: USB-C or an external charger suitable for Li-ion batteries
- USB charging current: 1.5 A
- Recommended charging current: 700 mA
- Maximum charging current: 3.3 A
- Charging indicator lights: red indicates charging, blue indicates a battery ready for use
- Protection mechanisms: overcharge protection, over-discharge protection, short-circuit protection and overheating protection
- Protective structure: steel construction protects against impacts, short circuits and other hazards
- Operating temperature: -20 °C to +60 °C
- Charging temperature: 10 °C to +45 °C
- Dimensions: diameter 18.6 mm, length 70 mm
- Weight: 50 g
- Compatibility note: longer than a standard 18650 battery, so device-specific compatibility must be checked
- Warranty: 12 months
- Package contents: 1 battery in blister packaging
- USB-C cable: must be purchased separately
- Performance standard: ANSI/PLATO FL1 handheld flashlight standard
- Turbo runtime: continuous runtime as light output decreases from 100 percent to 10 percent
Safe handling and correct charging practices support battery life and performance. Do not expose the battery to heat or dispose of it in water. After storage for three months or longer, the battery may need to be charged before use to achieve full performance. Keep the battery out of the reach of children, and seek medical attention immediately if swallowed.
High capacity, USB-C charging and comprehensive protection mechanisms make the battery a reliable power source for compatible devices. Charging indicator lights make it easy to monitor the charging status, while alternative charging methods add convenience.
Recommended use: suitable for compatible devices that use a protected 18650-size Li-ion battery and have sufficient space for a 70 mm long battery. The device's voltage, size and battery compatibility must be checked before use.
Product description updated on 19 August 2026.
