3 i would help if i could know the power needs of alienware 15 r3 in numbers so i could buy a power supply that works for me.
Alienware power bank.
See two posts i wrote recently on this topic here and here about power banks with high draw laptops.
Dell power companion 18000mah pw7015l and slim power adapter 65 watt dell notebook power bank plus usb c 65wh pw7018lc with dell adapter 65 watt type c with 1m power cord cus kit panasonic eneloop bk 4mcca8ba battery 8 x aaa type nimh rechargeable 800 mah.
And you definitely won t find a power bank capable of 240w output not even close.
4 i have found some power banks with power supply of 20v 5a will those work or do i need a ups.
So with a system like the alienware 15 you re probably stuck.
This model comes with an ac adapter cable manual and case.
That definitely won t be a good idea if you have limited power available from the outlet.
Small enough to fit in your pocket this lightweight and portable battery charger is perfect for on the go charging when you don t have the convenience of an ac outlet nearby.
42000 mah 146 wh power bank solar charger.
Available from a large number of vendors on amazon including floureon and powkey this high performance product can sometimes be found for a great price especially amazon lightning sales as of this writing the best price for 42000 mah 146 wh power bank is around 150.