Tattoo Power Supply - Ambition S1 Plus Touch Screen Tattoo Battery Wristband Supply Portable RCA Tattoo 2400mAh Lithium Battery Pack with LCD Touch Display for Rotary Tattoo Machine

Battery pack works great, the power on button should really be on the face of the watch instead of awkwardly on the side. Customer service is a bit hard to work through but they do respond to issues.

This thing is a clever idea but it overlooks a major obstacle which is the torch screen has to be responsive through a nitrile glove and at least one layer of some sort of barrier film. I use fairly thick nitrile gloves and unfortunately found it extremely difficult to get the screen to respond when trying to adjust voltage throughout the tattoo. It wasn't long before I ended up reverting back to my trusty table top power supply and foot pedal.It also seemed the voltage was not quite accurate. 8 volts on the watch seened much weaker than 8 volts on my usual power supply. Overall, i thought it looked like an interesting idea and i wanted to like it, but it just didn't measure up performance-wise and the screen being unresponsive through a glove and wrap is a a major issue. Tattooing without the glove and/or barrier film in order to be able to interact with the touchscreen is not really an option. I gave it one start for an interesting concept and one start for doing it at a very reasonable price, but that's about it.