
Best Fenix products in the Flashlight accessories category
On this page you'll find a ranking of the best Fenix products in this category. To give you a quick overview, we've already ranked the most important information about the products for you.
1. Fenix Akku ARB-L21-5000U
The Fenix ARB-L21-5000U is a rechargeable 21700 Li-Ion USB battery with a capacity of 5000 mAh and an integrated micro-USB charging port. The Fenix 21700 battery can be quickly charged via the USB port without the need for a separate charger. Alternatively, it can also be charged with an external charger. Like all Fenix Li-Ion batteries, the ARB-L21-5000U is housed in a robust steel tube, significantly reducing the potential risk of short circuits due to collisions or impacts. Additionally, the Fenix ARB-L21-5000U battery is protected against short circuits, overcharging, deep discharge, and overheating.
The high-quality Fenix Li-Ion battery ARB-L21-5000U has been specifically designed for use in high-performance flashlights. With its high capacity of 5000 mAh, excellent performance, and high reliability, the Fenix type 21700 battery is the best choice among rechargeable Li-Ion batteries.
Advantages of the Fenix 21700 ARB-L21 5000 mAh battery:
- Original 21700 Fenix battery with 5000 mAh, rechargeable via USB Type-C cable
- Charge status indicator with built-in LED
- Specifically designed for high-performance flashlights
- Integrated protection circuits against short circuits, overcharging, deep discharge, and overheating
- Pressure reliefs to prevent explosions
- High mechanical protection due to steel casing
- Button-top design
- High quality and reliability
- Fast charging capability, approximately 500 charge cycles
- No memory effect, very low self-discharge
Technical specifications:
- Model: ARB-L21-5000U
- Battery type: Li-Ion
- Battery shape: 21700
- Capacity: 5000 mAh
- Nominal voltage: 3.6V
- Energy storage: 18Wh
- Max discharge current: 8A
- Charge current: USB: 2A, charger: 1A / max. 5A
- USB charging port: Yes, Type-C
- Charge cycles: 500
- Dimensions: 76 mm × ø21.5 mm
- Weight: 72.5 g.

2. Fenix ARB-L18-3500U
The Fenix ARB-L18-3500U is a protected 18650 Li-Ion battery with a capacity of 3500 mAh from Fenix. It is ideal for Fenix flashlights designed for 18650 Li-Ion batteries, such as the Fenix PD35, PD35TAC, TK15UE (not TK15), TK16, TK35, and TK35UE. The battery does not work in the Fenix PD32 and FD65, as well as in flashlights that already have a USB charging option. Due to the charging electronics, the battery is approximately 0.5 mm longer than standard protected batteries. It can be charged via Micro-USB and regular Li-Ion battery chargers. Package includes: 1 piece Fenix ARB-L18-3500U mAh.

3. Fenix Arb-L18
Fenix Battery ARB-L18-2600 18650 Lithium-Ion Battery, 3.6 V. Suitable for high-performance flashlights. Triple overheat protection for maximum safety. Overcharge and over-discharge protection. Packaging unit: 1 piece.
This rechargeable battery from Fenix is particularly designed for use with high-output flashlights. The battery has a voltage of 3.6 V and a capacity of 2600 mAh. With triple overheat, overcharge, and over-discharge protection, the battery is safe to use and delivers reliable performance.
Energy:
Voltage: 3.6 V
Capacity: 2600 mAh
Additional information:
Packaging unit: 1 piece
Battery capacity watt-hours: 9.36 Wh
Battery type format: 18650.

4. Fenix Accu/Battery ARB-L21-4000P mAh
Lithium-Ion battery 21700P with 4000 mAh/3.6V for the models LR35R, PD36R, and TK22 V2.0. It is designed for particularly high power output, hence the addition of "P".

5. Fenix FNX ARB-L16-800UP
Li-ion rechargeable battery - Fenix ARB-L16-800UP - type 16340 with USB-C charging connection. Charging takes place directly via a USB-C cable or a compatible charger. The integrated protection devices protect the battery from overcharging, deep discharge and short circuits. The steel outer casing effectively protects it from damage caused by external influences. Suitable for torches, headlamps, bicycle headlamps and camping lanterns with a 16340 rechargeable battery. The charging indicator at the positive (+) end of the battery clearly shows the charging progress (red = charging, blue = ready for use). Fast charging with 0.5 A, the battery is fully charged in just 2 hours. Retains up to 70 % of its capacity after 500 charging cycles. Charging options: USB-C cable, charger such as Fenix ARE-D1, ARE-D2, ARE A2, ARE-A4. Multiple battery protection (overcharge protection, deep discharge protection, short-circuit protection, overheating protection). The steel protective structure effectively protects the battery from possible short circuits and other risks due to shocks. USB-C cable not included in the scope of delivery.

6. Fenix Akku für TK22 und PD36R
Lithium-Ion Battery with Long Runtime
With a capacity of 5000 mAh, the Type 21700 ARB-L21-5000 V2.0 battery offers extended operating time for the most powerful Fenix lights. Its riveted steel casing, gas pressure relief vents, and built-in electronic protection devices ensure safe operation. The Fenix ARB-L21-5000 V2.0 retains up to 75% of its original capacity after 500 complete charge and discharge cycles.
Technical Specifications
Nominal Voltage: 3.6 V
Capacity: 5000 mAh
Power: 18 Wh
Recommended Chargers:
220 V: Fenix ARE-A2 / Fenix ARE-A4
USB: Fenix ARE-D2 / Fenix ARE-D1.

7. Fenix Cable switch AER-02 V2.0
The Fenix AER-02 V2.0 cable switch is a high-quality accessory for flashlights that allows for user-friendly remote operation. With an overall length of 34 cm and a cable length of 23 cm, this switch offers flexible handling, making it ideal for tactical applications. Made from robust T6-grade aluminum, the switch ensures durability and resilience under various conditions. The AER-02 V2.0 is compatible with a variety of Fenix flashlights, including models such as PD35, TK09, TK11 R5, TK12, TK15, TK21, TK22, TA20, TA21, and TK30. This accessory is particularly useful for users who need comfortable control of their flashlight without having to take their hand off their weapon or other devices.
- Compatible with multiple Fenix flashlight models
- Made from high-quality T6 aluminum
- Provides user-friendly remote operation
- Lightweight design with a weight of 53.2 g.

8. Fenix Cable switch AER-05
Technical specifications of the cable switch FRS5 (AER-05):
• Cable length: 23 cm, total length: 34 cm, end cap diameter: 29 mm
• Specialized for tactical flashlights with APF circuits
• Aluminum in A6061-T6 quality
• Compatible with the TK16 V2.0 flashlight using a 21700 battery.

9. Fenix ALG-18
Universal mounting suitable for items with a diameter of 15-23 mm and for mounting on items of 23.5-28 mm. Increased distance between the two pipe holders to accommodate items with a large head of up to approximately 7 cm in head diameter. Made from durable and high-strength aluminum.

10. Fenix AOT-04, silicone signalling cone 40mm red
Signal cone made of soft silicone
The Fenix AOT-04 signal cone is compatible with flashlights that have a head diameter of 40 mm. Its soft material makes it easy to carry in a bag or case. The perforated end allows for reading documents. It is available in red or white.
Compatible with Fenix lamps: TK22, WF26R, PD40R, C7
Dimensions: 152 mm length, 43 mm diameter.
