Comparison · Batteries

Samsung INR18650-25S or Samsung INR18650-25R

Two models side by side: measurements taken by the author in their reviews, and their conclusions. The better value in each row is highlighted.

In brief: Based on review measurements: Capacity: Samsung INR18650-25S (2507 mAh vs. 2500).

Model	Samsung INR18650-25S2020Read review →	Samsung INR18650-25R2016Read review →
Current, A	25	25
Capacity, mAh	2507	2500
Review conclusion	Recommended	Recommended

Only in one review: Voltage 3.7 V (Samsung INR18650-25R); Test current 15 A (Samsung INR18650-25R); Temperature rise 102 °C (Samsung INR18650-25S); Price 14.59 $ (Samsung INR18650-25R).

Samsung INR18650-25S: The 25S performed better than the 25R at 15–20 A and can handle higher currents, though voltage sags at 30 A and above.

Samsung INR18650-25R: Capacity at 1C almost exactly matched the datasheet; the test load reached 15 A.

Figures were taken from the review text and checked against the quoted passages. Measurement conditions differ between reviews, so read the reviews yourself before buying. Prices at the time of review.