I am just starting to acquire some new flashlights as I apparently have the inherent desire to collect them. My next addition is going to be the Armytek Wizard Pro V3 XHP50 USB Rechargeable "headlamp". That said, it uses an 18650 battery. Prior to purchasing flashlights and their specific batteries, I began vaping. I am very familiar with the 18650 batteries that are used in vaping and can't help but notice that there seems to be a great difference between the two battery functions. The overlapping good qualities for flashlight and vaping 18650 batteries are to have high mAh and also be high-drain. The part that I am not entirely understanding, however, is the amperage qualities. In vaping, higher amp batteries are generally better (a 30A battery is better than a 20A) if you're looking to vape at higher wattages. The Armytek flashlight that I mentioned I will be purchasing states that the amperage should not exceed 10 amps (maybe 12 amps) if I heard/read correctly? So now I am confused. I realize that there are plenty of "flashlight" manufacturers that sell batteries designed for flashlights but most of them do not provide any further details other than perhaps their voltage and how many mAh they are. I cannot find any R ratings or amperage ratings on most of the flashlight branded batteries. Perhaps it isn't as competitive of a metric in the flashlight battery industry since 30A-40A batteries are not designed for flashlight use like they are in vaping? I am curious, however, to know what the best battery would be for the few flashlights I have just started to purchase and how I can intelligently purchase batteries based on the specifications each flashlight recommends. And if I am correct in that the Armytek flashlight should not have a battery exceeding 10A, how would a 4A, 6A, and a 10A battery affect its performance should all of the other variables remain the same. If you've taken the time to read this, I apologize for my lack of battery intelligence and appreciate your time assisting me.