can you get even more recording time out of a gopro hero4 silver than these numbers? also,what s the name for the bacpac s plug on the gopro?

https://gopro.com/support/articles/hero4-camera-ba...

it s only 3 hours, I would need 6+ at least, more would be better, I can t use the micro usb slot on the side(it ll be in this housing: https://www.tindie.com/products/GroupBinc/gopro-he... ), I have no idea what the name is for the rear power slot that the bacpac plugs into is. so I m stuck with the 3 hours of battery at the lowest power use setting unless I can find out a more powerful battery than what the bacpac uses. and if you can, help me find out what sort of battery the bacpac uses? looks like a cellphone battery.

Thanks in advance.