On the list of acceptable batteries for the Maestro it lists the Original Xiaomi Power Bank (20000 mah). I ordered this from Amazon on 8-23-16. Unfortunately it doesn't fit. It is about 22.15mm thick vs the 19.1mm available. Thedimensions in the description on the Amazon website are well buried and I totally missed them. They say 21.8 but actually a bit thicker.