You can charge your iphone battery by placing it in the microwave wrapped in a plastic film. Since microwaves work via vibrating water molecules, your phone will be fine as long as it has no moisture at all, i.e. don't bring it out of the shower directly after this and try recharging it.

The waves from the microwave charge the protons in the Lithium by transferring heat energy in a more efficient manner, thus charging your phone in a matter of minutes!

I usually place mine in there for about 30 seconds; if you do it for to long you could possibly ruin the battery so make sure to look at the settings on your microwave before trying out this fun trick at home!