The UPS3 is designed specifically for the ODROID-C1 / C1+ / C2. 

Uninterrupted Power Supply is an electrical apparatus that provides emergency power to a load when the input power source, typically mains power, fails. The on-battery runtime of most uninterruptible power sources is relatively short but sufficient to start a standby power source or properly shut down the ODROID.

It is equipped with a rechargeable 3,000mAh Lithium Polymer battery and a charger with a booster IC for 5V output. 

When the AC power source fails, the UPS3 keeps supplying the power to the ODROID-C1/C1+/C2 with the battery. There is a digital output pin to notice the battery low-level warning to the ODROIDs to trigger the shutdown process. And the AC power source available, UPS3 will supply the power to the ODROID board again automatically. It will significantly reduce the risk of data loss by sudden power-down.

Thanks to the 40pin connector with long pins, you can stack an add-on board on the UPS3.

Full guide, schematics, PCB layout file and detail information is 
on our WiKi : http://odroid.com/dokuwiki/doku.php?id=en:odroid-ups3

Note: 

The supplier of the product has no replacement and/or refund policy as part of their product warranty/guarantee. Furthermore, the repair cost and the cost of shipping to and fro from South Korea has to be borne. As Fab.to.Lab is merely an intermediary we extend the exact same warranty terms to all customers of Harkernel.

Please find more details here: Supplier warranty terms and conditions: https://www.hardkernel.com/agreement/

Software update is required. 

PACKAGE INCLUDES : - 5V/2A Power Supply - 3000mAh battery pack - UPS Board - 2 x 11mm PCB spacer (metal) - 4 x 5mm screw (metal)

BOARD DETAIL :

SPECIFICATION DC Input Voltage / Current DC 4.8V ~ 5.4V / 2A minimum Battery Charging Time / Current 1.5 ~ 2 Hours / 2A maximum DC Output Current / Voltage Maximum 2A / 5V Battery Pack 3,000mAh Lithium Polymer Connector : Molex 51021-0200 Battery Life Cycle Carry out 400 cycle charging / discharging @ 20±5℃ Integrated Protection PCB Over charge and discharge protection Estimated Running Time 2-4 hours with typical load of 300mA @ 5V