Welcome back! We saved your shopping cart for you: View Cart

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
Click to Enlarge Image
  • 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
Usually ships the next business day
Battery Junction Wholesale Account Signup
Battery Junction Free Keylight On Purchases Over $20 Promo

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
57 Reviews
84% (48)
9% (5)
2% (1)
0% (0)
5% (3)
By Repair M.
Lincolnton NC
They had my battery
November 15, 2022
I looked all over the internet trying to find an obsolete battery and finally found it Battery Junction. It took no time to receive the battery as they stated when I placed my order. Soldiered metal tabs onto the new purchase and reassembled and worked and charged perfectly. Thanks!
By Mark R.
A standard for a reason
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 Mel A.
Denver, CO
18650 battery
March 9, 2022
Seems to be working fine.
By Wally
Menasha, WI
Almost what I ordered
February 28, 2022
While these did much better than a previous purchase from another vendor of cells that were supposed to be 9000 mAh (silly me!), they are not 2500 mAh as advertised. I tested each of the dozen I ordered, and they came in at 2253 to 2313 mAh, with an average of 2282 for the batch.
By John
Good service
February 28, 2022
Good price
Related Items

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

  • $4.95
  • & Free Shipping On Orders Over $50
  • In Stock