Overheating Protection for Smartphone

thingiverse

For longer bike rides, I usually have my [warbiking equipment](http://www.dahlgrimm.de/Arduino/RasPi_GPS_tracker/RasPi_GPS_tracker-Seite6.html) installed on the bike. The Kismet server runs on a RasPi3. A smartphone is used for navigation and as a GUI for the RasPi3. Smartphone and RasPi3 communicate via USB tethering - as a side effect, the smartphone is **constantly** charged. And this has become more of a problem on warm days, because the smartphone is in a weatherproof holder and -thereby- not sufficiently cooled. Now, with my new *thing*, I am hopeful that the smartphone will no longer report battery overheating messages. UPDATE: [Yesterday](https://www.gpsies.com/map.do?fileId=gqijdarebvqouzws), the part has proven its effectiveness. Although the phone has switched off again due to overheating, but that happened during a break of half an hour. We sat in the shadow - but the bike was in the blazing sun .... and thus lacked the cooling airstream. In the future, I'll probably have to pull out the tethering cable when we take a break.