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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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$8.95
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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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Review Summary
5.0
18 Reviews
5
100% (18)
4
0% (0)
3
0% (0)
2
0% (0)
1
0% (0)
By Mark R.
N.E.Ohio
High performance flashlights friend
November 9, 2022
There is good reason for this battery being suggested as a "go to" for high power flashlights. It flat out preforms well. As a new purchase time will tell for the long run but even that has a solid record
By Shopper
WestCoast USA
Quality product and a fair price. Good customer service and fast shipping.
September 28, 2022
Quality product and a fair price. Good customer service and fast shipping. I wiil buy again and recommend BATTERY JUNCTION.COM. Thank you.
By Jon K.
Mountain City, TN
Awesome Battery
September 4, 2022
Seems to last forever and very quick to recharge. Love this battery.
By Jack
Colorado
Zebralight SC700d
August 18, 2022
The correct battery for this light. Get them when they are cheap, they seem to fluctuate a lot.
By Paul
Monett, MO
Great Product & Fast Shipping
February 9, 2022
Received this items faster than expected.

Also, in being transparent, I ordered these by mistake. I had meant to order the 18650's but messed up my search and ordered these instead. 100% my error.

And I am glad I did, these will actually fit my need better than the lower capacity 18650's. I have actually placed an order for the original 18650 so that I can build the original battery for use in another application.
Bright Buys
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Samsung 40T INR 21700 4000mAh 3.7V Unprotected High-Drain 35A Lithium Ion (Li-ion) Flat Top Battery

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