Solar Torch with twin LEDs on keyring
This dual LED solar torch is very powerful for its size and it easily activated by a press button. The twin hi-brightness LEDs are powered by internal Ni-Cd batteries that are kept topped up by the key ring's built-in solar cell.

It is claimed to be the most powerful solar torch in the world with a beam distance of 25 meters, not too bad for a little torch only 7 cm long.
Just a few minutes exposure per day will keep the torch fully charged and ready for immediate use.It had a clear casing that allows you to see the components inside.