No it is working on battery because the 2 ways that motherboard can be powered are bridged! I will upload a picture to understand it... (you can tell me your email to send you pictures)

Sent a PM!

Hello Thomas!

Both motherboard and LCD controller board need 12volt power to operate. The motherboard has two ways to power it, one from an external 12v power supply (like a common laptop pc), and second from an internal power supply (like a common desktop pc). I used a 12v external power supply to power the motherboard and with a pair of wire I connect the LCD controller to the other connector of powering the motherboard, because the 2 ways are bridged. And in the end I installed a 12v li-ion battery to just power the motherboard... Unfortunately the power consumption in hi enough and I need to buy a bigger battery ( I used a 6400mAh).

I hope you can understand what I have write because my english are not to good... please understand!

Yeah, I understand! That's what I wanted to plan on my laptop as well. But this means your laptops screen does not work on battery, but on AC power?

Hey, I saw you've used a controller to power and control the LCD. How will this work on a battery, as you need to power the laptop and the controller? I'd love to hear from you!