Test/review of Samsung INR18650-25R 2500mAh (Cyan) Ebay

Samsung INR18650-25R 2500mAh (Cyan) Ebay

Official specifications:

  • Style: Flat Top

  • Chemistry: INR

  • Nominal capacity: 2500 mAh (2200 mAh)

  • Max Continuous Rated Discharge: 20A (at 25 degrees Celsius)

  • Max Pulse Current (Less than one Second Pulse): 50A

  • Dimensions: 65.0 ± 0.2 mm (L) x 18.3 ± 0.2 mm (D)

  • Weight: 45g (Max)

  • Discharge Cut-off Voltage: 2.5V

  • Nominal voltage: 3.7V

  • Full Charge Voltage: 4.2V ± 0.05V

  • Cycle info: Capacity drops to 60% after 250 full charge/discharge Cycles

  • Standard Charge: CC/CV at 1A / 4.20V ± 0.05V, 100mA Cut-off

  • (Max) Rapid Charge: CC/CV at 4A / 4.20V ± 0.05V, 100mA Cut-off

  • Operational Charging Temperature Range: 0 to 50 degrees Celsius (Best below 45 degrees Celsius)

  • Operational Discharging Temperature Range: –20 to 75 degrees Celsius (best below 60 degrees Celsius)

  • You can store them for 1.5 years at –30 to 25 degrees Celsius, 3 months at 30 to 45 degrees Celsius and 1 month at 30 to 60 degrees Celsius (in other words, store them in a cool place and they’ll last longer)

What do you get when buying a Samsung INR18650-25R on Ebay?

The two cells match fin, but capacity is lower than rated value.


The battery has less capacity and can deliver less current than a real Samsung INR18650-25, but is not as such a bad cell.

Notes and links

How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries
Graphical comparison to 18650 and other batteries
Table with all tested LiIon batteries

Thanks HKJ!

It’s a fake sh*t battery, just to look at the positive pole.

Yes, it is a fake Samsung, but a real battery and much much better than one of these:

no shit sherlock