I built a couple of these for my son and his wife but they have gone to pod systems. They are a aluminum Hana styled enclosure 40mmX24mmX92mm that are meant for a DNA200/250 with lipo but I found that for the DNA75 it works well with an embedded Panasonic/Sanyo/NCR 20700B 4250mAh cell. Works with Evolv Escribe software like all DNA devices. Very solid and small devices. I made one for myself as a garage mod and have banged it up pretty good and still has not missed a beat! Asking $40 plus 5.50 (sorry, shipping cost went up) for shipping OBO each. Possible trade for Orion DNA. The blue/grey one has been sold. The teal colored one is still available. I will even throw in a TFV8 baby beast tanks (stainless steel) if that helps the sell it.