CSQ CSW9 is a mini PC that dual boots Android and windows operating systems. It has a 2000 mAh battery and an internal drive bay for 2.5 inch disk drive. CSQ CSW9 price is 200 dollars and is available from AliExpress.com which includes free shipping as well.
CSQ CSW9 is very small in size measuring just 15x15x4 cm and can fit into tightest of places. Its built in battery ensures that it will provide some back up in case of power failure.
CSQ CSW9 specifications
Intel J1900 Quad Core 2.41Ghz, 2GB DDR3L RAM, 802.11n Wi-Fi, Bluetooth 4.0, 1x HDMI, 3x USB 2.0, Built-in 2.5 inch 500G Hard disk and IR port. The box includes a user manual, USB cable and charger.