Mast U1 Tattoo Battery Wireless Power Supply for RCA Rotary Tattoo Pen Machine (Black)

Very pleased with value of battery duration of the charge. The ability to be free of wires. I love MAST tattoo machines and accessories.

I've got 6 already, just because I wanted 1 for each of my fave liner an shader pens,, I've went 8 hours with these an still had a enough charge to run these soft black and grey's . They hold up well with cnc short pens , mast tour pro pens, hummingbird bronc v9 pen, elite pen. Solid in my opinion,

I purchased the Mast Tour back in early 2020 during the lockdowns and have been using it ever since. VERY RELIABLE.

I ordered 2 of these batteries, and 1 of them (the one on the right) does not work. As you can see the connector is entirely different from the one that works- not really sure how it got messed up that bad. Anyways at least one works I guess.

So the last battery pack I got (from a different buyer) was good but it was too heavy and kind of leaned in one direction so my lines weren’t coming out as clean as they should have been. Now THIS battery pack is so much better and light! Does not lean in any direction whatsoever. Definitely worth the money.

Works great

I loved this battery. When it worked! However I've only been able to get two sessions out of it and then it stopped working. Turned off to change cartridge and never turned back on. It blinked to show it was charging initially but in the middle of this Tattoo it died and never took a charge again. I thought this was just a bad one so I had amazon swap me for a new one. Worked well again for two sessions and came to do another and wouldn't turn on again. I love Mast products but there is a huge quality control issue with these batteries. I'm so disappointed.

Love it, only issue is it dies when it says it’s at 60%.