Fenix ARB-L16-800UP: USB-C Charging and Compatibility FAQ

Charging the ARB-L16-800UP

How do I charge the ARB-L16-800UP?

Plug a USB Type-C cable into the port built into the battery itself. You do not need a separate charger. The battery's indicator light is red while charging and blue when charged.

Does the battery come with a charging cable?

No. The supplied information states that a USB Type-C charging cord is not included, so plan to use a compatible cable you already own or add one to your order.

What charging current does it use?

The listed charging current is 0.6A, and the current by USB port is 0.5A. Treat these as the battery's stated figures rather than a recommendation for a specific charger or power source, which the supplied information does not specify.

Can I leave it plugged in until the light turns blue?

The indicator light is the stated signal: red while charging, blue when charged. The battery also includes overcharge protection, so the light is your practical cue to unplug.

Compatibility questions

Which Fenix lights is the ARB-L16-800UP designed to work with?

The supplied compatibility list is E18R V2.0, GL06, GL22, LD15R, PD25R and HM50R V2.0. If your light is not on that list, do not assume the battery fits or works; check your light's own documentation first.

Is this a standard 16340 size?

Yes, it is a 16340 button-top battery. Its listed dimensions are 35mm in length and 16.7mm in diameter, with a weight of 18.8g (0.66 ounces).

What are the electrical ratings?

The ARB-L16-800UP is listed at 800mAh nominal capacity and 3.6V nominal voltage. Those are the figures to compare against your light's requirements.

Battery facts that affect your decision

• Fenix ARB-L16-800UP Built-in USB-C Rechargeable Battery: Built-in USB Type-C charging port; a charging cord is not included. You can charge without a dedicated charger, but you must supply your own USB-C cable.

  

• Fenix ARB-L16-800UP Built-in USB-C Rechargeable Battery: Designed to work with E18R V2.0, GL06, GL22, LD15R, PD25R and HM50R V2.0. This is the supplied compatibility list; lights outside it are not confirmed to work with this cell.
• Fenix ARB-L16-800UP Built-in USB-C Rechargeable Battery: Protection circuit in the anode plus overcharge, discharge, short circuit and overheating protection. These are the safety layers Fenix lists for this battery, relevant if you are comparing it with an unprotected cell.
• Fenix ARB-L16-800UP Built-in USB-C Rechargeable Battery: Indicator light is red while charging and blue when charged. Gives you a simple visual check on charging status without a separate charger display.

Safety and long-term use

What protections does the ARB-L16-800UP include?

The supplied information lists a protection circuit in the anode to help prevent short circuits, overcharge, over-discharge and overheating. It also notes pressure relief vents, a steel shell for impact resistance, and three sets of over-head protection: a pressure relief valve, separate microporous protection, and PTC cathodal block protection.

How many charge cycles can I expect?

The supplied information states that 500 charge cycles can be expected from a properly maintained battery. It does not define what maintenance steps are required beyond that statement, so follow the charging-light cue and avoid abuse.

Is there a warranty?

Yes, the battery carries a 12-month free warranty from the date of purchase, per the supplied information.