Look on ebay under the keywords 'gpd pocket' or 'nanote p8' to see what I mean.
I replaced the battery but it still wouldn't run off it's own battery alas. I had a crazy ass lipo & dc-dc converter I'd use it with. Now a days with usb-pd I could just make a simple dc adapter cable for it, but I got rid of it. One of the only laptops I've ever actually discarded. But great machine.