Quote Originally Posted by Sekt View Post
If it were me, I'd use one of those lithium polymer batteries for model helicopters (long as their safe) and maybe use Velcro armband to attach to arm or even shoulder of Tattooist. Then have an RCA lead coming from arm/shoulder powerpack. You'd have to make sure power pack gives a warning, and shuts itself down if it goes below three volts.
That way, the weight is not on ones hand/fingers, its mobile, and use with any machine. Those lipo batteries should go forever. Then use voltage regulator (or ESC to regulate the motor speed no matter what the battery state or motor demand) with adjustable voltage button/knob/display etc. Oh an send me a cheque when you make some cash lol!
Then why even bother going battery if there's still a cord? Might as well wrap a regular cord around your arm, unless you wanna go jogging with it. I like the idea of a completely cordless with quick interchanging rechargables. But yeah it'd be nice if it was minimal weight and size, that thing still looks heavy and boxy.