



JETBeam JR51 21700 5100mAh 3.7V Protected High-Drain Lithium Ion (Li-ion) Button Top Battery with Built-In Micro USB Charging Port
- High-capacity 21700 battery perfect for a wide range of high-powered flashlights
- Lithium-ion chemistry is rechargeable many times over for long-term use
- Battery has a Micro-USB port for simple, versatile recharging
- 5100mAh capacity provides long runtimes in compatible electronics
- Size: 21700
- Voltage: 3.7
- Rechargeable: Yes
- Chemistry: Li-Ion
- Capacity (mAh): 5100
- Terminal Type: Button Top
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Description
JETBeam JR51 Rechargeable Li-ion 21700
5100mAh Battery with USB Charge Port
The JETBeam JR51 is a rechargeable li-ion battery perfect for high-powered flashlights and more! This 21700 battery has a massive 5100mAh capacity to provide long runtimes to compatible electronics. A built-in protection circuit enhances safety with the JR51, with safeguards against over-charge, over-discharge, and incorrect installation (reverse polarity protection). Complete with a Micro-USB port, you can recharge directly from outlets, power banks, and more!
- Notable Features
- » Rechargeable li-ion 21700 battery with 5100mAh for long runtimes in compatible electronics
- » Ultra-safe battery design with built-in protection circuit to safeguard against reverse polarity, over-charge, and over-discharge
- » The Micro-USB port provides fast, easy power via a cord you likely already own!
- » Meets international safety standards including RoHS, CE, and KC - plus has undergone extensive Underwriter Laboratories testing
- » Button top terminal perfect for use in powerful flashlights and consumer devices
Item Details
| Brand | JETBeam |
| SKU | JETBEAM-JR51 |
| MPN | JR51 |
| UPC | 6957883801719 |
| Size | 21700 |
| Voltage | 3.7 |
| Battery Rechargeable | Yes |
| Capacity (mAh) | 5100 |
| Chemistry | Li-Ion |
| Packaging | Boxed |
| QTY Per Package | 1 |
| California Residents | see Prop 65 WARNINGS |
Specifications
| Size | 21700 |
| Voltage | 3.7 |
| Battery Rechargeable | Yes |
| Capacity (mAh) | 5100 |
| Watt Hours (wH) | 18.4 |
| Terminal Type | Button Top |
| Protected | true |
| Integrated Charge Port | Yes |
Unit Dimensions
| Weight | 2.85 oz (81 g) |
Certifications & Transport
| Certifications/Standards | ANSI, CE, FCC, IEC, UL |
| Country Of Origin | China |
| HTS Code | 85076000 |
Packaging/Shipping Dimensions
| Length | 5.98 in |
| Width | 3.57 in |
| Height | 0.85 in |
| Shipping Weight | 0.18 lb |
Documents
Additional Details
| Packaging | Boxed |
| Warranty |
JETBeam 1 Year Warranty Battery Junction Warranty |
| Return Policy | Return Policy |
Bright Buys
- 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
- 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.
- 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
- 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
- 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
- Upgraded to output up to 3,100 lumens with a 1,000ft throw for optimal spotting!
- Offers fast, direct USB-C recharging from outlets, power banks, and more
- Ultra-slim design provides an easy-to-hold, simple EDC lighting solution
- OLED screen monitors performance, including charge level, brightness & beyond
- Pre-shrink wrapped Panasonic CR123A batteries great for OEM use & more
- 1550mAh high capacity keeps lights, alarms & more running longer
- Lithium cells with stable 3V output and strong discharge performance
- Storage life of up to 10 years ensures backups remain ready for use







