you can find gamer PC at a good price here

Asus G550JK-CN253H 15.6-inch Full HD LED Gaming Laptop

I have

Samsung Galaxy Note 4 N910U 32GB LTE (White) - Unlocked Sim Free 1.9GHz Octa Core

and no problem whit the battery.

Sedatech PC Gamer Ultimate Desktop Intel i7-3770 4x 3.4GHz Processor