Price is for an individual battery.
Please note these are the new Samsung Green 25R (No longer blue).
"What is the difference between the blue and green Samsung 25R 18650?
Samsung SDI guarantees that the performance of the 25R2 with blue PVC and 25R5 with green PVC are totally same.
The percentage of Electrolyte is change than 25R5
FEC: 3 -> 5%
SN: 1.5 -> 1%
PA77: 1-> 1.5%
The life cycle would be better than 25R5
Bottom-line: The green 25R5 has a better cycle life.
A cycle is one full charge and discharge of the battery. If someone asked you how old a battery is, you should answer by telling its cycle count. So what is the cycle life the 25R? A quick check of the spec sheet yields the answer:
The 25R2's life is: 250 cycles. This is tested at 20A, the cell's max. continuous discharge rating.
After 250 cycles the maximum capacity the 25R2 can hold dips to 1500mAh or lower (this is at 60% of its starting capacity, at 25℃).
So we can say that the 25R5 has a cycle life greater than 250 under these same conditions."
With a 20 amp max continuous discharge this battery can handle sub-ohm builds down to .22 ohms (at your own risk).
Nominal capacity: 2500 mah
Max Continuous Rated Discharge: 20 amps (at 25 degrees C)
Nominal voltage: 3.6v
After a fresh charge: 4.2v
Cycle info: Capacity drops to 60% after 250 full charge/discharge Cycles
Don't discharge below: 2.5v
Standard Charge: CC/CV @ 1 amp / 4.20 volts +/- .05v, 100 mA cut-off
(Max) Rapid Charge: CC/CV @ 4amps / 4.20 volts +/- .05v, 100 mA cut-off
Impedance: 22.15 +/- 2 milliohms
Height: 64.85 +/- 0.15mm
Diameter: 18.33 +/- 0.07mm
Operational Charging Temperature Range: 0 to 50 degrees C (best below 45 degrees C)
Operational Discharging Temperature Range: -20 to +75 degrees C (best below 60 degrees C)
You can store them for 1.5 years at -30 to + 25 degrees C, 3 months at 30 to 45 C and 1 month at 30 to 60 C (in other words, store them in a cool place and they'll last longer)