Didn't work with my bishop wand packer(Machine still working with critical power supply)Good quality construction thoSo far so good but only used once so we’ll see how it holds out but it’s doing fairly well.i like it, it's made very well and doesn't feel like cheap material! has been reliable for me the last two times i have used it.used with my staves pen as a secondary power source and works great, the tactile controller is very responsive. IT does arr a little bit of weight but nothing major.Bronc is a solid brand. My father is a professional tattoo artist and I've given him this along with the pen and he's been using it faithfully for 2 months. No issues.This review is for the Bronc R1 BatteryWell made and super easy to use. Love the Olded screen Lasts a long timeWhat attracted me to this wireless power supply was the fact that it has such a long run time, five to eight hours. But once I received the battery unit, it became very clear that there was much more to this, and it would improve my tattoo machines immensely.The reason for that is that this is truly featherweight. It's so light, that once it's installed on anyone of my tattoo pens, I cannot feel any weight or balance difference. To me this is very important, since I have several machines that are on the longer side, and the battery usually has a real effect on the balance.With this I honestly can't feel a difference, even on the machines that are long and tend to feel top-heavy.The controls on this are laid out beautifully, with soft touch buttons, and excellent LED readout. Very simple to adjust, and very easy for these old eyes to read.I love the whole package on this wireless power supply/battery. It's the best one I've come across yet, and really made me appreciate the quality.Comes with USB charging cable.