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i doubt it, that would make a contact in between the top and bottom, which is actually a short, so all the power (as small as it is) will go through that instead of whatever you want to power
a green LED works at as low as 2.1V, you'd need at least two of these in series, probably more around 3 to get the necessary 5V, also, that LED takes around 20mA, compared to a phone that should take much, much more. With enough batteries, it should be possible tho
IKEA Shelf Safe with Magnetic Key
Redneck Backyard Zamboni Ice Resurfacer
Preparing for Natural Disasters.
Make a small, but powerful 30KV Van De Graaff generator