Samsung INR18650-25R Battery Genuine & Tested - 20A (100A pulse) 2500mAh - Flat Top - Wholesale Discount


  • $ 4.86
  • 39

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Genuine Samsung 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 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 real so you can be confident you've got the real thing. 

Note:  You may receive batteries from the Malaysia Samsung plant, which have an M on them after the model number so some people call them the 25RM or the INR18650-25RM.  These are the same as the battery without the M, are manufactured to the same specifications by Samsung SDI, and in all our testing show comparable performance 25R vs 25RM.


  • Chemistry:  INR
  • Max Continuous Discharging Current: 20A
  • Max Pulse current (less than one second pulse):  100A
  • Typical Capacity: 2500mAh
  • Style:  Flat top
  • 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

Battery safety is very important.  Mistreated batteries can get extremely hot and/or vent which could cause injury.  Always follow the following rules to make sure this doesn't happen.  We are not liable for mistreated batteries.


  • Never completely discharge batteries (below 2.5V under load or 3V unloaded).
  • Charge fully (to 4.2V) before first use.
  • Never use a lot of force on the battery to install
  • 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.  
  • Be mindful of the current limits in the specification and never exceed them.
  • Never keep a spare battery loose in a pocket, purse, etc.  Always use protective cases for loose batteries.  If it shorts against a piece of metal it can be very dangerous.
  • Never charge battery 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 battery then do it in a case or individual box in cool and dry place at approximately 3.6V - 3.7V.
  • Never try to charge or discharge li-ion batteries with battery chargers that are not made for Li-ion batteries. 


    Customer Reviews

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    • Reviews (39)
    • Questions (0)

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    Your input is very much appreciated. Share it with your friends so they can enjoy it too!
    Griffin P.
    United States
    • What device/application do you use this with? Vape

    Awesome batteries would buy again

    I bought 2 18650 batteries and they are probably the best in quality and life. Would buy again thanks for being such a great site!

    Charles C.
    United States
    • What device/application do you use this with? Ecig

    1 failed

    Hello, I've been slow to make contact due to moving recently but one of the 25R batteries in my last order has stopped accepting a charge after a week of use.. Other than that I've been very happy with your company..


    Liion Wholesale Batteries

    Hi Charles - thank you for your feedback. Unfortunately, being mass produced as these are, bad batteries do happen. However, unlike many other companies, we guarantee that you will get good batteries (if any cell is dead on arrival, we replace it if you let us know within 14 days of receiving your order). It also sounds like you might've gotten a bad cell given how little you used it, so we'll be in touch to talk about what we can do to address this.

    Dale M.
    United States
    • What device/application do you use this with? Sigelei 150w vaping device

    Really needed these!

    These batteries last 2x as long as any others I've purchased! Thank you Liion!

    Jeonghyun C.
    United States
    • What device/application do you use this with? Eleaf iStick Pico vape mod

    great battery

    it works just fine. there haven't been any issues with it.

    Ronald M.
    United States


    I have been using these Samsung batteries for over six years. Never had a problem.

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