



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: 3.6/3.7
- 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 |
| UPC | 6957883801719 |
| Size | 21700 |
| Voltage | 3.6/3.7 |
| 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 | 3.6/3.7 |
| 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 |
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
- 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


