In other applications, batteries in parallel produce twice the amps and in series twice the voltage. So if I'm using a mech with 2 parallel 26650-20A CDR batteries, am I safe to build coils that pull over 20A? I would assume so, but want to be sure. I'm not trying to do a build that pulls 40A, but I have a nice dual coil build at around .2ohms that steam engine says is 21 amps at a full 4.2V. I also have a new 3-coil RDA that I am having trouble putting coils with more than 5 or 6 wraps in due to the limited space inside. The highest I can get the ohms on it is around .14. That's 30A and 130W of drain on my batteries. How much is too much?