I have a fully functional and lightly used COW COW Tech BBU it weights 18g which is even lighter than the UAC BBU I have posted! This piece has no quirks or problems whatsoever since I barely got to use it. It may seems suspicious about all the BBU's I have listed but do not fear I just wanted a different color! Buyer will cover shipping, if you wish to see more pictures or have any questions feel free to ask, trades are open to anything and I will respond to all offers. Thanks for reading and have a good one!