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Whenever I connect my Nexus One to the official car dock, my phone heats up rapidly, and eventually restarts. Obviously, the phone is restarting to prevent it from damaging itself. So the question becomes why is it over-heating (the phone can draw too much current for its own good?) and how can I prevent it from happening. As a side note, I have never observed this happen while I had the phone charging in the official desk dock, although most of that time I was asleep, and it has happened infrequently while I was charging it and still using it.

Thanks in advance.

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  • Shutting off the screen while using navigation seems to be the best solution, as I'll still get verbal prompts.
    – MBraedley
    Sep 18, 2010 at 18:54

2 Answers 2

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Can you check with the GPS turned off for a while?
I've heard reports of heating and restarts most of which refer to multiple things being active increasing current demands from the dock.
Here are a few references,

  1. N1 heat issue while charging + GPS? at the nexusoneforum
  2. Nexus One is overheating in car dock, becoming unresponsive (google android forum)

here is a quote from the second link,

have use car dock overheat problem before, But I solved the problem now! The car dock 12V to 5V adaptor it can provide max. 2A current maximum, the phone voltage is 3.7V, when you use this adaptor direct connect to the Phone Car Dock, the phone begin charging, the charging current supplied by car adaptor, if you at same time your phone operating like navigation (GPS, Data) or video streaming and just not the screen off , this time the phone's power provided by car adaptor through the phone itself, therefore the current = charging current + operatin current provided by car adaptor.

This probelm very easy to solve, you just need to buy USB car adaptor from car accessories shop, the USB car adaptor maximum supply current not more than 1A or less, and then buy a micro USB cable connnect to the car dock body, the overheat problem have been solved.

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  • I haven't had the opportunity to run an extended test, but the problem didn't present itself on my short commute to work this morning. My battery was nearly completely charged though, and the sun wasn't shining on it due to overcast skies, the opposite of both being possible factors earlier.
    – MBraedley
    Sep 8, 2010 at 18:53
  • So I had about an hour on the road and tried the dock without gps on. It eventually restarted, but took significantly longer. It's a bit of a bummer that I can't use navigation while the phone is charging in the dock.
    – MBraedley
    Sep 11, 2010 at 2:26
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Place it on the air conditioning vent and velcro it on. Now you have a speed charger with no overheating. I had the same issue and this solved it.

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