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Samsung 25R INR 18650 2500mAh 3.7V Unprotected High-Drain 20A Lithium Ion (Li-ion) Flat Top Battery - Bulk

Samsung SAMSUNG-INR18650-25R alternate view 1
Samsung SAMSUNG-INR18650-25R alternate view 2
Samsung SAMSUNG-INR18650-25R alternate view 3
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  • INR chemistry offers the safety and stability of IMR with the improved performance
  • Samsung provides high quality batteries with reliable output for all devices
  • High maximum continuous discharge rates make it suitable for high drain devices
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Samsung 25R

20A High Drain, Flat Top 18650

One of the most well-known batteries on the 18650 market, the Samsung INR18650-25R has earned its reputation for a good reason. For a reliable and high-quality 18650 battery, you can't go wrong with Samsung.

The 25R hits that sweet spot with a 2,500mAh energy capacity and a 20A continuous high-discharge rating, making it an ideal choice for OEM battery packs in high-drain devices.

Li-ion INR Chemistry

Utilizing advanced LiNiMnCoO2 (INR) li-ion chemistry, the INR18650-25R's secret is a blend of manganese and nickel for extra energy while remaining stable and safe. These kinds of batteries keep a low internal resistance (≤m18Ω), while retaining high energy capacity, continuous discharge rates, and a low operating temperature.

Note that batteries are sold individually.

Rechargeable & Reusable

Invest in a rechargeable battery that will last for years to come– this battery can be recharged 250+ times.

High Discharge Rate

20A 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

» 2,500mAh capacity offers long-lasting 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.


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.
Battery Size:18650
Battery Capacity (mAh):2500
Battery Chemistry:Li-Ion
Battery Voltage:3.7
Battery Terminal Type:Flat Top
Battery Shelf Life:3 Years
Packaging:Contractor Pack
Warranty:Battery Junction 30-Day Warranty
Return Policy:Battery Junction Return Policy
Product Weight:1.587oz
Product Dimensions:2.553" (L) x 0.722" (Diameter)
Country of Origin:China
Associated Battery Sizes:168A, 18650, 19670, Protected 18650, Unprotected 18650
51 Reviews
88% (45)
6% (3)
0% (0)
0% (0)
6% (3)
By Louis
Good Battery
March 19, 2021
I have purchased these batteries before, so I'm familiar with them, Battery Junction gave me a fair price and quick delivery.
By Diana
March 16, 2021
Their great. I really like the price I gave for them. I'm a very happy customer.
By M
Top Notch
February 25, 2021
These batteries work really well, they've been through about 50 charging cycles, and I don't notice any loss, and at the best price I've found anywhere.
By Brian
Great battery
February 15, 2021
I have been using these 25r batterys for some time now. They last a long time.
By John
Campwood, Tx.
January 11, 2021
Just what I was looking for.
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Samsung 25R INR 18650 2500mAh 3.7V Unprotected High-Drain 20A Lithium Ion (Li-ion) Flat Top Battery - Bulk

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