If the power fails when we have at hand a torch may be a problem, we have to move groping to find our way in the dark and reach the counter. Not need to have who knows, just a small torch, preferably with rechargeable batteries so not to risk when we need to find download.
This USB mini flashlight is perfect, is very compact, measuring only 2.2 cm in diameter and 5 cm in length, but it's still a lot of light through the white LED (8000-12000 mcd).
The battery is rechargeable and lithium, ensures a duration of over 2 hours and fully recharge the same time. The convenience is that it charges via USB cable and not just the back of the flashlight is made as a thumb drive, then just remove the plug and plug it directly into a USB port .
The outer shell is solid fairy in black ABS plastic opaque and the light is switched on by turning the end of the torch.
You can find it on thinkgeek.com