Ok I am running a 7" lcd 4:3 screen that runs off of 12v..
So here is what I had planned

the batteries are super small 3.7V 650mah lipos.. they are wired in sets of 3 in series.. totalling 11.1v and 4 of those packs are wired in parallel

1. My question is first of all will this work? i don't see any problems with it unless i am missing something?
2. Second, will 1 pcboard work for charging all batteries at 11.1v and are lipos an issue with charging?
3. The last question I have is what is the approximate total run time of this setup pushing to the 12v 7" lcd 4:3 screen and n64 board?
Any help here would be amazing. I have zero electronics knowledge so i'm looking for some help from anyone with experience on this. Thank you in advance!