Panasonic NCR18650PF high drain rechargeable Li-ion batteries. (3.6 volts).  2900mAH. Made in Japan.  These are the flat top batteries.  These NEW Panasonic batteries offer a longer run time than the CGR18650CH 2250mAh batteries. With a big 10A discharge. These are the replacement of the Panasonic NCR18650PD batteries with a slight modification to the button top for better solderingThe 18650 3.7V Panasonic Hybrid IMR NCR18650PF rechargeable battery cell is made for high current (max.10A) applications. 10 Amperes is more than enough to run almost any high drain (high discharge current) electronic device. They are often used in flaslights, computers, vaporizers, e-cigs, power tools and more.Size: 65.09mm tall  18.20mm wideMax Discharge Current: 10ANominal Voltage: 3.6vCapacity: 2900mAhThe NCR18650PF batteries have a lower internal resistance than your regular 18650 battery cells, and will deliver a higher voltage under load.