

Samsung 40T INR 21700 4000mAh 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): 4000
- Terminal Type: Flat Top
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Description
Samsung 40T
High 35A Continuous Discharge Rate
The Samsung 40T is a 21700 battery that offers both a 35A max continuous discharge rate, and a large 4,000mAh capacity for extensive runtimes. That discharge rate can be further pushed to 45A for short-term (pulse) power.
As this is an unprotected cell with flat top terminals, the 40T is ideal in battery packs made for use in high-drain electronics.
Rechargeable & Reusable
Invest in a rechargeable battery that will last for years to come– this battery can be recharged 250+ times.High Discharge Rate
35A max continuous discharge rate for high-drain electronics, great for making battery packs for devices that require minimum discharge rates.3 Year Shelf Life
Stock up and store spare batteries with confidence– lithium ion batteries have a 3+ year shelf life, ensuring you always have a fresh replacement when you need it.Notable Features
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 | Samsung |
| SKU | SAMSUNG-40T |
| MPN | INR21700-40T |
| Size | 21700 |
| Voltage | 3.7 |
| Battery Rechargeable | Yes |
| Capacity (mAh) | 4000 |
| Chemistry | Li-Ion |
| Sub-Chemistry | LiNiMnCoO2 INR / NMC |
| Shelf Life | 3 Years |
| Packaging | Contractor Pack |
| QTY Per Package | 1 |
| California Residents | see Prop 65 WARNINGS |
Specifications
| Size | 21700 |
| Voltage | 3.7 |
| Battery Rechargeable | Yes |
| Capacity (mAh) | 4000 |
| Terminal Type | Flat Top |
| Integrated Charge Port | No |
Unit Dimensions
| Length | 2.768 in (70 mm) |
| Diameter | 0.835 in (21 mm) |
| Weight | 2.469 oz (70 g) |
Packaging/Shipping Dimensions
| Length | 2.77 in |
| Width | 0.84 in |
| Height | 0.84 in |
| Shipping Weight | 0.154 lb |
Documents
Additional Details
| Packaging | Contractor Pack |
| 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





