model: samsung sdi icr18650-26a nominal capacity : 2,600mah nominal voltage : 3.7v dimension : d 18.25mm, h 65.0mm charge method : constant current, constant voltage (4.2v) max. charge current : 1cma (2,600ma) max. discharge current : 2cma (5,200ma) charging time : standard : 3hrs, rapid : 2.5hrs discharge temperature : -20¡ãc ~ +60¡ãc weight (approx.) : 48g we always do business with lithium-ion cylindrical 18650 cells, 2600mah, produced by samsung sdi, featuring good performance and bottom prices. for more information, pls visit www.18650.cn