I have an Aorus X5-MD gaming laptop (Aorus is the gaming division of Gigabyte, and appears to share some hardware, including the power system.) which has an input power specification of 19.5VDC 10.5A, or 200W.
I would like to extend this laptop's battery life - at present I get perhaps two hours, but I'd like at least four.
I'm looking for a slim and relatively inexpensive power bank that can supply the necessary current - the voltage doesn't seem to be a problem these days, but 10.5A would likely burn out most if not all typical power banks, most of the highest capacity power banks seem to have a maximum current of 4-5A.
I'd like something that I can put in my backpack and lug around, so relatively flat would be good.
Alternatively, if there was any way of using several lower-power-capacity power banks connected in parallel in such a way that they didn't feed back into one-another and burn out/explode, I'd consider that too.
If the only option is a power bank with mains AC output, it'd have to be Australian 240V 50Hz true sine-wave output(so I can use it for other things), at 300W to allow for conversion losses.