Žal za večino telefonov tovrstnih ovitkov v naših trgovinah ni mogoče kupiti in jih boste morali poiskati na spletu.

Najbolj simpl, poceni in nadvse učinkovit ovitek za vodoodpornost telefona je, da ga zavežemo v kondom. :-)

"Če ni elektrike, nič ne bo delovalo"

GravityLight daje svetlobo, elektriko zanjo pa ne dobimo iz baterije, sončne celice ali po električnem kablu. Zapisali so: Hang a GravityLight from a wall or ceiling, fill the bag with rocks or sand and winch it up. You may not realise it, but you've just created a battery. As the bag slowly falls to the ground it drives a generator through a gearbox, which provides direct electrical power for an LED, creating 20 minutes of light.
deciwatt.global/gravitylight