
Fenix ARB-L21-5500 21700 5500mAh 3.6V 10A Protected High-Drain Lithium Ion (Li-ion) Button Top Battery
- Rechargeable lithium-ion battery with high capacity and drain rate
- 500-recharge cycle life provides reliable service over the long term
- Compatible as a power source for flashlights, headlamps & industrial equipment
- Charge up at rates up to 4.5x faster than other li-ion cells
- Size: 21700
- Voltage: 3.6/3.7
- Rechargeable: Yes
- Chemistry: Li-Ion
- Capacity (mAh): 5500
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Description
Fenix ARB-L21-5500
The Gold Standard for 21700 Batteries
The Fenix ARB-L21-5500 is a premium 21700 li-ion battery with a high capacity and drain rate that makes it perfect for flashlights, headlamps, and more! Rechargeable up to 500+ times and with an energy rating greater than 4x disposable CR123A cells, the ARB-L21-5500 will become your new long-runtime lithium-ion battery choice. It is also as safe as they come, with both analog and digital protection mechanisms, keeping your gear in working order and the battery ready to work another day. Accommodating fast discharge and fast charging, it's ready to support high-power lights and high-speed charging options. Upgrade gear that uses 21700 li-ion batteries with the 5500mAh ARB-L21-5500.
- Notable Features
- » Heavy duty design up to 20%+ greater energy density than average 21700 cells
- » Integrated protection circuits make this battery compatible with fine-tuned modern lighting equipment
- » This eco-friendly choice lasts longer than hundreds of disposable cells and retains up to 75% of its capacity after 500 charge cycles
- » Both physical and digital performance safeguards make this a better choice than many others for rechargeable household electronics
- » Can be recharged while installed in the body of a flashlight with a USB charge port, or in many li-ion battery chargers!
Item Details
| Brand | Fenix |
| SKU | FENIX-ARB-L21-5500 |
| Series | ARB |
| Manufacturer Part Number | ARB-L21-5500 |
| UPC | 6942870355627 |
| Length | 3.02 in (77 mm) |
Specifications
Power Details
Unit Dimensions
| Length | 3.02 in (77 mm) |
Certifications & Transport
| Certifications/Standards | ANSI|CE|FCC|UKCA |
| HTS Code | 850760 |
Packaging/Shipping Dimensions
| Length | 3.2 in |
| Width | 1 in |
| Height | 1 in |
| Shipping Weight | 0.17 lb |
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
- 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
- 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
- Independent 4-slot charging for different batteries
- Touch screen control provides user-friendly operation
- 4 working modes for charging, testing batteries, and more
- Compatible with Li-ion, Ni-Cd, & NiMH batteries
- Quick Charge 3.0 technology enables fast and efficient device charging
- USB compatibility supports a wide range of electronic devices
- Compact adapter design makes it ideal for travel and everyday use
- Intelligent charging management helps optimize power delivery
- Universal cable to consolidate chargers for work, home, or EDC use
- USB-C, Micro-USB, and Lightning plugs for various electronics
- USB-C input with USB-A adapter for use with any USB power source
- 3.93ft long cord, allowing you to use your phone during recharging!
- Premium materials for durability and fast charge speeds
- Fits flashlights w/ diameter of 24-32mm & length of 130mm-170mm
- Great for EDCs, tactical lights, slim lights, & more!
- Durable and flexible nylon material keeps lights secure
- 33g weight won't drag you down!
- Portable powerhouse - emits a 1148ft beam from a 3.4in light!
- Strobe and SOS modes accessible for emergencies
- Dual-fuel power - swap in a CR123A when needed
- Strong magnetic tailcap for hands-free repair jobs
- USB-C port offers seamless recharging from anywhere!
- 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


