LED lamp/spot light with battery power

[AshD]

Hi,

I am faced with situation at 2 places in my home, where I need/have a LED lamp/spot light (ones that go in entertainment units/side panel) but dont have a power socket close by and keeping a wire hanging will spoil the entire look.

Anyone has ever powered a LED or a spot light with a battery pack of any kind?

I have seen hawkers using 1 ft tube lights with car batteries, but I don't have that kind of space to hide the big battery.

Any other option? Looking for suggestions.