








Fenix ARB-L21-6000B 21700 6000mAh 3.6V Protected Lithium Ion (Li-ion) Button Top Battery with Built-In USB-C Charging Port
- Long-lasting lithium-ion 21700 battery with 500+ charge cycles
- Get extended runtimes with best-in-class capacity of 6,000mAh
- USB-C input/output port for recharging and powerbank capability
- High-performance protection circuits for safer, more intuitive use
- Size: 21700
- Voltage: 3.6
- Rechargeable: Yes
- Chemistry: Li-Ion
- Capacity (mAh): 6000
- Terminal Type: Button Top
Recently viewed
Description
Fenix ARB-L21-6000B
Rechargeable Li-Ion 21700 Battery with Bidirectional USB-C Port
The Fenix ARB-L21-6000B is a rechargeable lithium-ion 21700 that functions as both a battery or power bank! With 3.6 Volts and a 10A max discharge rate, it is designed for use with a wide range of flashlights, lanterns, and more. Where the ARB-L21-6000B stands out is its industry-best 6,000mAh capacity, which is able to provide reliable extended runtimes in any compatible application. The ARB-L21-6000B also has its own USB-C input/output port for recharging via computers and wall adapters or use as a standalone power bank! With this single high-capacity 21700 battery, you're now able to recharge your flashlight, phone, and other devices whether you're in a power outage or on-the-go.
- Notable Features
- » Rechargeable li-ion 21700 battery with incredible 6000mAh capacity and dual functionality as a flashlight power source and standalone power bank
- » USB-C charge port integrated on battery for fast, easy recharging up to 3A from a wide range of sources
- » First-of-its-kind multi-stage LED indicator built into the battery itself to indicate the battery status at a glance
- » Extensive protection circuits optimize performance and safety, providing overheat and over-discharge prevention and more
- » Versatile charge options via the integrated USB-C port, conventional li-ion battery chargers, or compatible flashlights with in-body charge ports
Item Details
| Brand | Fenix |
| SKU | FENIX-ARB-L21-6000B |
| Series | ARB |
| MPN | ARB-L21-6000B |
| UPC | 6942870311906 |
| Size | 21700 |
| Voltage | 3.6 |
| Battery Rechargeable | Yes |
| Capacity (mAh) | 6000 |
| Chemistry | Li-Ion |
| Packaging | Boxed |
| QTY Per Package | 1 |
| California Residents | see Prop 65 WARNINGS |
Specifications
| Size | 21700 |
| Voltage | 3.6 |
| Battery Rechargeable | Yes |
| Capacity (mAh) | 6000 |
| Watt Hours (wH) | 21.6 |
| Terminal Type | Button Top |
| Protected | true |
| Integrated Charge Port | Yes |
| Max. Discharge Rate | 10 |
| Equivalent Types | 21-70, 2170, 21700 |
Unit Dimensions
| Length | 3.03 in (77 mm) |
| Diameter | 0.87 in (22 mm) |
| Weight | 2.82 oz (80 g) |
Certifications & Transport
| Certifications/Standards | ANSI, CE, FCC, UKCA, UN 38.3 |
| Country Of Origin | China |
| HTS Code | 85076000 |
Packaging/Shipping Dimensions
| Length | 3.3 in |
| Width | 1.2 in |
| Height | 1.1 in |
| Shipping Weight | 0.2 lb |
Documents
Additional Details
| Packaging | Boxed |
| Warranty |
Fenix 1 Year Warranty Battery Junction Warranty |
| Return Policy | Return Policy |
Bright Buys
- Trusted and reliable; consistently rated as a top customer pick for LED flashlights
- Superior 1,600mAh capacity means longer runtimes and less frequent battery changes
- Optimized for both high and low drain devices
- State-of-the-art automated production lines ensure the highest quality and safety protections
- Ideal for low-drain applications that require a primary battery to provide constant power
- 10-year shelf life - stock up for emergencies!
- The best choice for consistent power, great in low-drain devices like remotes
- Safe and reliable - capable of performing in high or low temperatures
- 11-in-1 card sized tool fits in your wallet or on a keychain!
- Packed with handy tools including a screwdriver & 7 wrench settings
- Serrated saw and straight-edge knife for quick cutting jobs
- Can + bottle openers for campsite meals or end-of-shift relaxation
- Four-channels saves time by charging multiple batteries at once.
- Capable of charging multiple chemistries by automatic battery detection.
- LCD display reveals the charging progress, battery type, voltage, and charging current.
- Automatic power-off function cuts off the current when charging is complete.
- Trusted and reliable; consistently rated as a top customer pick for LED flashlights
- Superior 1,600mAh capacity means longer runtimes and less frequent battery changes
- Optimized for both high and low drain devices
- State-of-the-art automated production lines ensure the highest quality and safety protections
- Extremely compact and powerful EDC
- Max output of 3,000 lumens with a max throw of 229 meters
- Dual fuel and available with extender for use with a 26650
- Equipped with 4 x CREE XPG3 LEDs for maximum illumination
- Reliable lithium chemistry with a 10 year shelf life
- Regarded as one of the highest quality CR123A batteries on the market
- Used in LED flashlights, alarm systems, ranger finders and more
- Cells are lightweight, durable and ideal for long term storage
- Jacket style may vary
- 225mAh capacity drives long runtimes for watches and electronics
- CR2032 coin cells packed with 3V of power
- Convenient 6-piece retail card provides backup batteries
- Easily replaceable primary lithium cells
- Top recommended battery for Apple AirTags
- Trusted and reliable; consistently rated as a top customer pick for LED flashlights
- Superior 1,600mAh capacity means longer runtimes and less frequent battery changes
- Optimized for both high and low drain devices
- State-of-the-art automated production lines ensure the highest quality and safety protections
- 3,000 lumens and a 250-meter throw - fierce illumination to light up your backyard
- Multiple output modes are accessible via easy side switch operation
- Strobe, SOS, and beacon modes offer distinct signaling capability
- High-capacity battery supports the light with a maximum 227-hour runtime



