So I was watching a video on youtube about 18650 batteries. Now in the video there is a picture with different mah and amp batteries. There also shows a recommended wattage for my particular battery of 40w to 60w. I'm confused because I didn't realize there was ever a recommend wattage for each battery. I thought it all depended on the ohms you were running as long as you'r battery can support those amps. I'm confused because on steam the ohms law says if I use a .5ohm coil and I run it at 120watts it's only using 15 amps or so. Is this video misleading or am I missing something?