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Samsung 40T INR 21700 4000mAh 3.7V Unprotected High-Drain 35A Lithium Ion (Li-ion) Flat Top Battery

Samsung 40T 21700 Battery vertical
Samsung 40T 21700 Battery horizontal
samsung 40t 21700 angled positive terminal facing
samsung 40t 21700 angled negative terminal facing
Samsung 40T 21700 Battery vertical
Samsung 40T 21700 Battery horizontal
samsung 40t 21700 angled positive terminal facing
samsung 40t 21700 angled negative terminal facing
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$8.35
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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

» 4,000mAh capacity provides long runtimes for all your devices
» Flat top terminal is perfect for use in making OEM battery packs
Please note that these batteries have flat top terminals, and may not be compatible with some devices.
Check with your device's user manual whether your device requires button top or flat top terminals.
You can browse our selection of button top 21700 batteries here.
BrandSamsung
MPN40T
Color
Blue
Size21700
ChemistryLi-ion
INR (LiNiMnCoO2)
Voltage3.6V
Capacity4,000mAh
TerminalFlat Top
ProtectedNo
Shelf Life3 Years
RechargeableYes
Voltage
Nominal3.6V
Maximum4.2V
Cutoff2.5V
Discharge Rate
Pulse45A
Max Continuous35A
Charge Rate
Max4A
Standard1.5A
Charging Time
Max1.16 Hours
Standard3 Hours
Charge Cycles250+
Length2.76" / 70.3mm
Diameter.84" / 21.22mm
Weight2.47oz / 70g
Country of OriginSouth Korea
UPC736952858474
WarrantyBattery Junction 30-Days
Return PolicyBattery Junction Return Policy

WARNING: UNPROTECTED LI-ION BATTERY

Unless equipped and 'protected' with a PCB (protection circuit module) and/or similar device, lithium ion (li-ion) rechargeable battery cells are not recommended by BatteryJunction.com or our parent and associated companies, or the respective manufacturers, as a stand-alone product. Misuse of lithium ion rechargeable battery cells can pose a serious risk of personal injury or property damage.
Use caution when working with li-ion cells, as they are very sensitive to charging characteristics and may explode or burn if mishandled. Make sure the user has appropriate understanding of li-ion rechargeable batteries in charging, discharging, and assembly before use. Always charge in/on a fire-proof surface. Never leave charging batteries unattended. We are not responsible for damage if there is any modification of the batteries/chargers in any shape or form (including but not limited to pack making). We are not responsible for any damage caused by misuse or mishandling of li-ion batteries and chargers.
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.
Specifications
Battery Size:21700
Battery Capacity (mAh):4000
Battery Chemistry:Li-Ion
Battery Voltage:3.7
Battery Terminal Type:Flat Top
Battery Shelf Life:3 Years
Packaging:Contractor Pack
Brand:Samsung
Warranty:Battery Junction 30-Day Warranty
Return Policy:Battery Junction Return Policy
Product Weight:2.469oz
Product Dimensions:2.768" (L) x 0.835" (Diameter)
UPC:736952858474
MPN:INR21700-40T
Country of Origin:South Korea
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Reviews
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Review Summary
5.0
11 Reviews
5
100% (11)
4
0% (0)
3
0% (0)
2
0% (0)
1
0% (0)
By Gregg G.
Columbus Oh.
Great battery, Great price!
March 23, 2021
Shipping was fast, Works great. Will do business again with Battery Junction.
By VR
Great battery
March 12, 2021
Excellent batteries with a reputation for reliability
and high power draw. Fast shipping at a great price.
By Richard C.
Riverside County, CA.
Great Battery.
February 8, 2021
The Samsung 21700 40T is a legend among flashaholics. And now that I finally got a few of them to run in my torches, I am sold on them. Can't believe the boost in brightness my lights have when using the 40T. The overall run times are good, too.

Buying them through Battery Junction, I knew I was getting legitimate 40T's, and good customer service.
By Randal
Fayette Alabama
A top of the line battery
December 20, 2020
I’m very happy with the performance of these dependable Li-ion cells they last a long long time on a charge and my flashlight seems brighter than ever I am pleased to recommend these batteries for any suitable use you’ll never regret purchasing these ultra performance 21700s! 😃
By Tom
Melbourne, Florida
Great batteries
November 10, 2020
I am very happy with the performance of these Samsung batteries and the delivery service from Battery Junction.
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