I have been searching for some time now, but cannot find an answer to my problem. I had an earlier post asking about a battery pack for power, and receiving an answer, purchased a battery pack with three USB ports. Plugging the enclosed cable USB2.0-MicroUSB, it works great. The one thing I forgot to mention was that I have a 10” HDMI display, that has an electrical outlet connection. The documentation says it is 12V. Is there a way, connector, cable, or device that I can purchase that will allow me to take the PI with the attached HDMI display that can be used away from the home and electrical power outlets. Thanks in advance for any help.