Half a croissant, on a plate, with a sign in front of it saying '50c'
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Cooling mat for cellphone charging

Lithium ion batteries heat when charging
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Perhaps a peltier device with bluetooth connectivity to monitor battery temperature to maintain temperature at the appropriate level.
lostmind, Dec 09 2013

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       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
  
      
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