I've been making all my own power supplies, usb and single trustfire 3.7 batteries, but I make them in small cases that also hold the smallest size glass dropper bottle and the atty-901-so they're all in one. Double lipstick cases are a great size..you can get a lot of 10 covered in pretty asian fabrics on ebay for $14 shipped; also using mini sunglass cases(guess they're for folding glasses, about half length) from the local Dollar Tree stores, which are very nice to decorate yourself with jewelry/scrapbook/fabric embelishments, or nail polish and decals...I do so love these crafty type things!!