Long Lasting
"My go to battery for my Fenix lights. They hold their charge for a long time and provide consistent output. I prefer these over the USB rechargeable ones since I use a bank charger."






The Fenix ARB-L18-3400 is the latest addition to Fenix's collection of rechargeable lithium-ion batteries. This 18650 cell offers an impressive capacity of 3400mAh, which is ideally meant for use in high-drain devices, such as flashlights. The Fenix ARB-L18-3400 was designed with safety in mind. The powerful battery is equipped with a protection circuit that is built into the anode. The protection circuit is fitted with a steel hat so that the entire cell may be covered with a steel shell, thus eliminating any risk of short-circuiting caused by impact or collision. The PCB circuit also prevents a user from overcharging or over-discharging the battery. In addition to the PCB circuit, the 18650 lithium-ion battery includes pressure relief vents, just in case a short circuit does occur. While rare, these vents provide a safe way to expel waste gas from inside, which will prevent the cell from inflating and from ultimately exploding.
The Fenix ARB-L18-3400 has a button top design, making it compatible with a wider variety of flashlight brands and models. Fenix is known worldwide for its high-quality flashlights and headlamps. In addition to these high-quality lighting tools, they also offer equally as good cells for powering those lights. This high-capacity li-ion battery, when properly maintained, will keep up to 75% of its original capacity after 500 full charge and discharge cycles. When you need to depend on your flashlight for safety, make sure you have a quality battery to keep that light powered and running.
| Brand | Fenix |
| SKU | FENIX-ARB-L18-3400 |
| UPC | 6942870303888 |
| Size | 18650 |
| Voltage | 3.6/3.7 |
| Battery Rechargeable | Yes |
| Capacity (mAh) | 3400 |
| Chemistry | Li-Ion |
| Sub-Chemistry | LiCoO2 ICR |
| Packaging | Retail Packaging |
| QTY Per Package | 1 |
| California Residents | see Prop 65 WARNINGS |
| Size | 18650 |
| Voltage | 3.6/3.7 |
| Battery Rechargeable | Yes |
| Capacity (mAh) | 3400 |
| Watt Hours (wH) | 12.24 |
| Terminal Type | Button Top |
| Protected | true |
| Integrated Charge Port | No |
| Max. Discharge Rate | 2 |
| Length | 2.7 in (69 mm) |
| Diameter | 0.7 in (18 mm) |
| Weight | 5.6 oz (159 g) |
| Certifications/Standards | CE, FCC, RoHS |
| Country Of Origin | China |
| HTS Code | 85076000 |
| Shipping Weight | 0.15 lb |
| Packaging | Retail Packaging |
| Warranty |
Fenix 1 Year Warranty Battery Junction Warranty |
| Return Policy | Return Policy |
Overall rating: 4.5 / 5 from 2 reviews.
Review topics: [].
"My go to battery for my Fenix lights. They hold their charge for a long time and provide consistent output. I prefer these over the USB rechargeable ones since I use a bank charger."
"Ordered eight batteries for one flashlight. All of the batteries were in good condition and charged well. They are all in the flashlight at this time and working well."
Your cart is currently empty.
Start Shopping