RC experts -please recommend a battery for this

[Bamboopictures]

This HDMI transmitter draws 250mA at 12V. I would like to run it uninterupted for 10 hours straight.
Anyone here can recommend a reliable battery up to the job?
Any suggestion is much appreciated!

 

[DXNMedia]

The red-color power connector is called a JST connector. Usually quite standard for low-current applications for RC equipment (eg. FPV transmitter kit, cameras & receivers). Any 3-cell 11.1v lithium pack that is above 2500mah with JST connector should do the trick. If difficult to find a battery pack with JST connector, just ask for a JST adaptor.

 

[Bamboopictures]

Much appreciated! Thanks again, Dixon!