FENIX ARB-L21-5000 V2.0 LI-ION BATTERY

The Fenix ARB-L21-5000 V2.0 is a 5000 mAh rechargeable 21700 battery suitable, for example, as a replacement for the original battery in the Fenix TK20R V2.0 flashlight. The battery can be charged in a compatible battery charger or inside a flashlight whose manufacturer has designed it to charge this battery.

Suitable for

• Replacing the original battery in the Fenix TK20R V2.0

• Keeping as a charged spare battery for a compatible 21700 flashlight or headlamp

• Users who charge batteries in a suitable separate battery charger

• Powering a compatible flashlight with built-in charging

Why choose the Fenix ARB-L21-5000 V2.0?

• 5000 mAh nominal capacity

• Protection circuit helps limit the risk of overcharging, overdischarging and short circuits

• Steel casing protects the battery cell against mechanical impact

• Fenix states a battery life of 500 charge cycles

Technical specifications

• Manufacturer: Fenix

• Model: ARB-L21-5000 V2.0

• Battery type: protected 21700 lithium-ion battery

• Capacity: 5000 mAh

• Nominal voltage: 3.6 V

• Charging: in a compatible charger or via a flashlight charging circuit approved by the manufacturer

• Charging current in a separate charger: recommended 1 A, maximum 5 A

• Charge cycles: 500 according to the manufacturer

• Length: 76 mm

• Diameter: 21.5 mm

• Weight: 72.5 g

Included

• 1 × Fenix ARB-L21-5000 V2.0 battery

Frequently asked questions

Can the Fenix ARB-L21-5000 V2.0 battery be charged inside a flashlight?

Yes, if the flashlight supports charging this battery. For example, the TK20R V2.0 charges the included ARB-L21-5000 V2.0 battery via the flashlight's USB-C port.

Which separate charger can be used to charge the battery?

Fenix Lighting confirms compatibility with the ARE-A2, ARE-A4, ARE-D1, ARE-D2 and ARE-X1 V2.0 models.

Which battery should be used in the Fenix PD40R V2.0 flashlight?

For the PD40R V2.0, use the battery model specified in the flashlight's manual. Fenix Lighting lists this flashlight as an exception in the ARB-L21-5000 V2.0 compatibility list.

When is the Fenix ARB-L21-5000 V2.0 the right choice?

Choose the V2.0 if you need the same model supplied with a compatible flashlight or already use a suitable 21700 battery charger. If you want to connect a charging cable directly to the battery, choose the ARB-L21-5000U with a USB-C port.

We recommend

If you are looking for a replacement battery, check the model marking on the old battery and consult the flashlight's user manual. Also note the flashlight's generation. For example, V2.0 and V3.0 denote different models that may support different batteries. If you charge the battery in a separate charger, check its manual to see whether the slot can accommodate a 76 mm long protected 21700 battery and what charging current the manufacturer recommends.

If you have one flashlight and two batteries, a separate charger lets you charge the spare battery while the flashlight is in use. If necessary, label the battery case so you do not confuse the charged battery with the used one. Before heading out for fieldwork, test both batteries in the same flashlight.

5000 mAh replacement battery for a compatible 21700 flashlight

The Fenix ARB-L21-5000 V2.0 is suitable for users who already have a way to charge it. This model is, for example, the original battery supplied with the TK20R V2.0.