DC Plug and Cable Assembly 2.5mm 
- Inner(+) diameter 0.8mm and outer(-) diameter 2.5mm
- 270mm long (approx.)
- Max current rating: 2.5A @ 5VDC
- Compatible with C1 / C1+ / U3 / U2 / X2 / VU / W Docking Board
- If used with the C1+ in a Raspberry Pi case, a hole will need to be made in the case to access the 2.5mm power connector. However, the USB OTG port is available and accessible for power on the C1+ in a Raspberry Pi case.