Perhaps a peltier device with bluetooth connectivity to monitor battery temperature to maintain temperature at the appropriate level.
-- lostmind, Dec 09 2013

Or, a motorized tether which twirls the phone at high speed
-- sninctown, Dec 09 2013


Or a satellite updated series of catchers and slingshots that has cellphones flying above us.
-- lostmind, Dec 09 2013


The device could be in the form of a tall chrome plated pedestal that sweats beads of evaporation from its icy-cool surface.
-- pocmloc, Dec 09 2013


Or an air-hockey table that lets the phone drift around a little.
-- baconbrain, Feb 25 2015



random, halfbakery