
Jetbeam HL40 21700 4000mAh 3.6V Unprotected High-Drain Lithium Ion (Li-ion) Button Top Battery
- 4000mAh capacity delivers extended flashlight runtimes
- Rechargeable li-ion saves money with hundreds of cycles
- Great choice for the BC25 & JET-IIIMR JETBeam flashlights
- Can be charged in li-ion smart chargers!
- Size: 21700
- Voltage: 3.6/3.7
- Rechargeable: Yes
- Chemistry: Li-Ion
- Capacity (mAh): 4000
- Terminal Type: Button Top
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Description
JETBeam HL40 21700 Battery
Huge 4000mAh Capacity for Intense Flashlights
The HL40 is a 21700 li-ion battery by JETBeam features an impressive 4,000mAh capacity to act as a longterm power source. Get the most out of your BC25 and JET-IIIMR flashlights, or extend your runtimes on other 21700-compatible devices.
Utilizing li-ion chemistry, the HL40 can be recharged hundreds of times and is an eco-conscious power source that saves you money over time.
- Notable Features
- » Huge 4000mAh capacity for long runtimes
- » 100% rechargable in li-ion smart chargers
- » Great for JETBeam's very own BC25 and JET-IIIMR flashlights
CAUTION: Unprotected Li-Ion Battery
No express or implied guarantee of compatibility with any device can be made. Please do your research and make sure this battery is compatible with the item you intend to use it with.
Charge only in a smart charger designed for the specific type of lithium-ion batteries. Do not mix and match old and new, used and unused batteries.
Do not dispose in a fire. Regulations and laws pertaining to the recycling and disposal of lithium-ion batteries vary from country to country, as well as by state and local governments. Please consult your local jurisdiction regarding appropriate disposal. Many retail stores offer free recycling of rechargeable batteries.
Item Details
| Brand | JETBeam |
| SKU | JETBEAM-HL40 |
| UPC | 6957883868491 |
| Size | 21700 |
| Voltage | 3.6/3.7 |
| Battery Rechargeable | Yes |
| Capacity (mAh) | 4000 |
| Chemistry | Li-Ion |
| Packaging | Bag |
| QTY Per Package | 1 |
| California Residents | see Prop 65 WARNINGS |
Specifications
| Size | 21700 |
| Voltage | 3.6/3.7 |
| Battery Rechargeable | Yes |
| Capacity (mAh) | 4000 |
| Watt Hours (wH) | 14.4 |
| Terminal Type | Button Top |
| Integrated Charge Port | No |
| Equivalent Types | 21-70, 2170, 21700 |
Unit Dimensions
| Length | 2.84 in (72 mm) |
| Diameter | 0.83 in (21 mm) |
| Weight | 2.54 oz (72 g) |
Certifications & Transport
| Certifications/Standards | CE, RoHS |
Packaging/Shipping Dimensions
| Length | 4 in |
| Width | 3 in |
| Height | 0.6 in |
| Shipping Weight | 0.16 lb |
Documents
Additional Details
| Packaging | Bag |
| 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


