>>718084579
As long as it's only one(uno(1)) device connected to the makeshift battery, it'll just barely fall short which should be fine for most devices.

If you want to ensure full night operation, you can chain
>wall socket
>battery
>power strip
>battery
>device
to three devices from the strip for more oomph while not losing power to inefficiency that direct battery to battery chaining would introduce, though that would also cover one device and be simpler