This was one of the best 18650 cells ever made. It handles high current loads well (a max. continuous discharge of 20A) and has a good capacity of 2500mAh. As such, this has become a go-to cell for many industries. This cell is now known as the 25R2 (blue) to distinguish it from a newer version of itself, the 25R5 (green) which came out in early 2015.
The 25R is now completely replaced by the green 25R5.
Max. continuous discharge current: 20A
Safe pulse discharge ratings: 95A < 0.5 sec, 65A < 1 sec, 40A < 5 sec, 30A < 6 sec
Nominal capacity: 2500 mAh
Nominal voltage: 3.6 V
Discharge end voltage: 2.5 V
Charging voltage: 4.20 +/- 0.05 V
Standard charging current: 1.25 A
Length: 65.85 mm
Diameter: 18.33 mm
Weight: 45.0 g