Samsung 25R 18650 20A Flat Top 2500mAh Battery - Genuine - Wholesale Discount


  • $ 3.99
  • 271

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Genuine Samsung INR18650-25R 2500mAh batteries are a pretty new cutting edge battery cell from Korea that can handle some really high current.  This is the 25R5, the new green 25R.  They are an updated version of the old "smurf blue" ones.  The 25R is one of our favorites from our testing at high currents.  The 20A rating is very conservative and they tend to outperform other 20A batteries.  The problem is there are many counterfeits on the market but you can be sure these 25R's are genuine.  We've done extensive testing to be sure they're authentic so you can be confident you've got the real thing. 

There are both a Korean made and Malaysian made version of this cell.  The Malaysian one says "25RM" while the Korean one just says "25R".  These are made to the same specification and perform the same so you may receive either one from us.  If you require a certain version you can contact us to see which we have in stock. 


  • Chemistry:  INR
  • Max Continuous Discharging Current: 20A
  • Max Pulse current (less than one second pulse):  100A
  • Typical Capacity: 2500mAh
  • Style:  Flat top
  • Approximate Dimensions: 64.85 ± 0.15 mm (L) x 18.33 ± 0.07mm (D) 
  • Weight: 43-45g
  • Discharge cut-off voltage: 2.5V
  • Voltage: 3.6V
  • Full Charge Voltage: 4.2V ± 0.05V
  • Origin:  South Korea

Batteries are sold individually.

If your battery is damaged or defective on arrival (will not take its first charge, or has issues with its first cycle), please let us know within 14 days of receiving your order and we'll make it right. Please read our complete store policy on defective products here for more information and to see if you're eligible.

Manufacturer ratings: Please see more information regarding manufacturer ratings here.

Battery Warning

Warning: Lithium ion batteries may explode or burn due to improper use. Using these batteries for purposes not intended by the manufacturer, including outside a battery pack and/or without a BMS, may cause severe injury and damage. We are not responsible for any injuries caused by lithium ion batteries - use at your own risk.

All rechargeable batteries have inherent risks under any circumstance. Use caution with working with li-ion batteries (lithium-ion), LiPo (lithium ion polymer), and any rechargeable cells (together "rechargeable batteries"), as they have dangerous charging characteristics and are known to explode or burn if mishandled. A purchaser and user of rechargeable batteries should educate themselves on rechargeable batteries, especially as to charging, discharging, assembly, and storage. Learn more about proper storage and care for rechargeable batteries here. We are not responsible for any damage caused by the misuse or mishandling of rechargeable batteries.

Here are a few tips:

  • Never completely discharge batteries (below 2.5V under load or 3V unloaded)
  • Charge fully (to 4.2V) before first use
  • Never charge batteries to 4.3V or above
  • Do not charge unattended
  • Do not store your li-ion batteries fully charged for an extended period of time (weeks or more)
  • If you must store your battery, only store in a case or individual box in a cool and dry place at approximately 3.6-3.7V
  • Use only high quality battery chargers
  • Do not expose to heat
  • Do not connect the positive contact to the negative contact without an appropriate load
  • Never exceed the battery's specifications
  • Never try to charge or discharge li-ion batteries with battery chargers that are not made for li-ion batteries
  • Always charge these batteries on and within fireproof material
  • Never leave rechargeable batteries in a recharging station unattended
  • Do not use any rechargeable battery or charger if any visible damage is present, or if known mishandling, accidental or otherwise, has occurred
  • Always store and transport rechargeable cells in a safe, non-conductive container (never keep a spare battery loose in a pocket, purse, etc. and always use protective cases)
  • Properly dispose of all battery cells and chargers in accordance with local laws and mandates (if you're unsure, contact your local municipality)
  • If a rechargeable battery overheats, hisses, or bulges, immediately quarantine the battery from any combustible materials - ideally, take the battery outside
  • If a rechargeable battery catches fire, the FAA recommends pouring water or soda on the battery and surrounding areas - ideally, use a foam extinguisher to quell the fire

By purchasing this product, you agree that seller makes no warranties whatsoever with respect to the goods sold on this website, including any (a) warranty of merchantability or (b) warranty of fitness for a particular purpose, whether express or implied by law, course of dealing, course of performance, usage of trade or otherwise. Buyer acknolwledges that it has not relied upon any representation or warranty made by seller, or any other person on the seller's behalf. If purchasing for resale, buyer assumes all responsibility and agrees to forward all notifications and warnings to the purchaser.

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Michael H.
United States
  • What device/application do you use this with? My Wismec predator 228 and my Wismec RX 300


Love the new Samsung 30Q batteries and the 6bay EFest charger

Michael H. verified customer review of Samsung INR18650-25R Battery Genuine & Tested - 20A (100A pulse) 2500mAh - Flat Top - Wholesale Discount
Angela H.
United States
  • What device/application do you use this with? Smok Alien 220W


Works perfectly in my vape. Long lasting. Charges quickly in external charger. Great price! Best around! Will definitely buy from this company again if need be!

Angela H. verified customer review of Samsung INR18650-25R Battery Genuine & Tested - 20A (100A pulse) 2500mAh - Flat Top - Wholesale Discount
Warner S.
United States
  • What device/application do you use this with? Flashlights and Vapes

The best!!

Samsung 18650 are the best for vape and household use. I always have a set close by for some bright lights when needed !

Kirsten H.
United States
  • What device/application do you use this with? SMOK I-PRIV

Great Batteries; Super Buy!!

I'm very pleased with the performance of these batteries so far. I expect to continue to feel this way, as I have been extremely satisfied with every purchase I've made at Liion.

  • What device/application do you use this with? EVERYTHING

Swiss-army knife of 18650's

Got this batch on 11/28/2018 and received the 5 Malaysia (25R 5M) version with a manufacture date of 6/2018 (TIT2) nice and fresh. If you are looking for max power the R5 is better than the R6 as it has slightly less voltage sag. I prefer the R6 for the longer cycle life that Samsung claims is the difference in the newer R6 chemistry. I can say without question that the 25r is one of the most robust hi-rate 18650's on the market and at the same time inexpensive. These things can take a beating (not physically) without damage or rapid capacity loss. I use them with a diode block to prevent charging on my 3d printer in case of a power outage. I use 15 x 2 in a 12v 3s5p x2p configuration to replace the lead acid battery in my e-Lawn Mower. I use them 3s5p with a disconnect during run in combination with a super capacitor during operation buffer to replace ****** SLA battery's in both of my motorcycles. A electric cart I built for my son, it uses all my 3s5p packs combined in a 24volt configuration. I replaced cells in several cordless power tool battery's with these. I run my 18650 vape mods with r5's and also 2 rc cars with the r5's. I even use them in a couple hi-power led flashlights, even tho lower rate, higher capacity would be better, just because I no longer use any other 18650's. Its just easier to use the 25r for everything, its the Swiss-army knife of 18650's without the premium cost of a Sony VTC. The only instance in years that I did not use 25R was to replace cells in a laptop battery. I used hi-cap, low power cells for max run-time but even then 25R would have been better than the original cells.

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