Thanks for the replies. I had ideas of being able to play games without plugging into an electrical outlet, one method will use power banks that has built-in AC outlet, this will still need to use the AC/DC adapter of the laptop. I have seen plenty of portable power banks that has built-in AC outlet, these power banks ranges from 20,000 mAh to 64,000 mAh or higher and are small in size, almost the same size or even smaller than the laptop's AC/DC adapter.
Another method is to totally replace the AC/DC adapter with a pure direct DC power source (powered by batteries) although I have not found any device that functions like that but I did saw some power banks with a direct DC out jack.
I only have a few questions:
My laptop's AC/DC adapter has the following specification: Input 100-240v~50-60Hz 3.2A / Output 19.5V, 11.8A
When I measured the power consumption from the wall outlet while gaming it consumes around 160-180 watts of power from the outlet. On non-gaming use the consumption is around 38 watts only.
My questions below are more about basic electric consumption calculation and revolves around those two ideas of using a power bank or battery power to power the laptop via its charging port
1. Using a power bank with an AC outlet and having for example 40,000 mAh capacity, how long will this power bank last if the power draw of the laptop is on average 180 watts? I understand that this way of powering the laptop is not efficient since you will convert the battery power to AC and then the laptop's AC/DC adapter will convert it back to DC so there is some loss there. However, how can you calculate how long the 40,000 mAh power bank last in a 180 watts power draw?
2. Using a power bank that has a capacity of 40,000 mAh with a direct DC output, how long will the batteries last if the power draw of the laptop is on average 180 watts?
3. I cannot measure the laptop's AC/DC adapter power output draw so what does it mean if the AC/DC adapter's power output is 19.5V / 11.8A, does this mean that the adapter's power output has a constant draw of 11.8A or this also varies on usage? Because the power draw from the AC outlet where the adapter is connected varies on usage (i.e. 38 watts on idle, 180 watts while gaming).