$hua, 14500 is a different size batt for other mods. The batt Jay referred to you is a great battery. 14500 is closer to the size of a AA battery. you will probably never see 14500 in a 5V or 6V device (actually, I can think of one device but...). What I suspect Thye was saying (I am sure Thye will correct me if I am wrong) is that 14500 batt is being used in a different mod, is probably not of the AW brand and Thye is now considering getting the AW 14500 (for that other mod) to compare. However, the difference may not be overtly noticeable in a quick side by side. It may or may not last a bit longer per charge (mAh is not always accurate and high drains are more designed for the intense type uses like vaping). Overall, the general consensus is that AW makes the best quality and safest batteries. And, most of them (perhaps all - not sure) are of the high drain variety. so, 14500, rcr123a, 18650, 16340 - these are all different sizes like AA, AAA, C, D, etc... (obviously, those alkaline battery sizes are just for analogy purposes), however sometimes 123a and 16340 may be interchangeable.
I only use AW batts. In my unregulated 6Volt devices, I only use AW LifePO4 (rcr123a) at 3V and use a charger like the ones Jay is sending out with the manual switch to limit the charge at 3 volts. They still come off the charger at about 3.2 tho. Almost all batteries will come off a charger higher than their rated voltages. Most 3.7 volt batts will come off a charger at 4.2 volts. Too many people buy the wrong batts and the wrong chargers. Often, people buy unregulated 6V devices and stack 3.7 batts which are each coming off a charger at 4.2 so they are actually vaping at 8.4 Volts. Granted, that extra voltage does drop off pretty quick but nonetheless... Stick with Jay's recommendations.
Can't wait Jay!! I'll be waiting for the mailman - perhaps tomorrow! 
