


XTAR INR 21700 3750mAh 3.7V Unprotected High-Drain 35A Lithium Ion (Li-ion) Flat Top Battery
- Size: 21700
- Voltage: 3.7
- Rechargeable: Yes
- Chemistry: Li-Ion
- Capacity (mAh): 3750
- Terminal Type: Flat Top
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Description
Xtar INR 21700 Battery
3.7V 35A 3750mAh Unprotected High-Drain Flat Top Li-ion Battery
In a world of high drain devices, the need for dependable portable power has never been greater. The Xtar INR 21700 battery is perfect for power-demanding applications like flashlights, electronic skateboards, scooters, and vehicles, cordless power tools, customizable battery packs, and medical mobility scooters. The INR chemistry (Lithium manganese nickel or LiNiMnCo02) used in these cells provide stable and rechargeable power. This battery is a little bigger, physically than a standard 18650, so it has a slightly higher capacity as well. The high capacity of 3750mAh allows for longer run times, while the higher discharge rate of 35A provides more power for your device. These batteries are commonly used in high-drain flashlights due to their high discharge rate. Rechargeable hundreds of times, this battery will help you save money while keeping the planet green by reusing a drained cell.
Features:
- High capacity of 3750mAh
- High discharge rate ideal for high drain devices
- Rechargeable up to 500 times!
- Unprotected cell for easy customization
- Global Certifications: RoHS, CE
- PTC Fuse for inner cell protection
Technical Specifications:
- Battery Size: 21700
- Battery Chemistry: Lithium Ion (Li-ion)
- Battery Sub Chemistry: INR - Lithium Manganese Nickel (LiNiMnCo02)
- Terminal Type: Flat Top
- Rechargeable: Yes
- Protected Cell: No
- PTC Fuse: Yes
- Nominal Voltage: 3.7V
- Nominal Capacity: 3750mAh
- Max Pulse Discharge Current: 35A
- Max Continuous Discharge Current: 30A
- Estimated Charge Cycles: 500 cycles
- Shelf Life: 3 Years
Dimensions:
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 | XTAR |
| SKU | XTAR-21700-3750 |
| UPC | 6952918341611 |
| Size | 21700 |
| Voltage | 3.7 |
| Battery Rechargeable | Yes |
| Capacity (mAh) | 3750 |
| Chemistry | Li-Ion |
| Sub-Chemistry | LiNiMnCoO2 INR / NMC |
| Shelf Life | 3 Years |
| QTY Per Package | 1 |
| California Residents | see Prop 65 WARNINGS |
Specifications
| Size | 21700 |
| Voltage | 3.7 |
| Battery Rechargeable | Yes |
| Capacity (mAh) | 3750 |
| Terminal Type | Flat Top |
| Integrated Charge Port | No |
| Max. Discharge Rate | 35 |
Unit Dimensions
| Height | 2.78 in (71 mm) |
| Diameter | 0.86 in (22 mm) |
Packaging/Shipping Dimensions
| Length | 2.65 in |
| Width | 0.76 in |
| Height | 0.76 in |
| Shipping Weight | 0.16 lb |
Additional Details
| 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



