Never again changing your smoke alarm batteries - priceless

This Du Pont made smoke alarm screws into your light socket and it uses your house electricity to power itself. It also allows you install a light bulb in it, so are not left in the dark. Perfect. Self Charging smoke detector from Du Pont - $39.99 on your mastercard, never having to change its batteries - priceless.

[Self Charging Du Pont Smoke alarm]