On Fri, Feb 8, 2013 at 8:33 PM, David Anderson <[email protected]>wrote:

>
>
> On 08-Feb-2013 1:14 AM, Raistmer the Sorcerer wrote:
>
>  NativeBOINc has option in local preferences/computing: While battery
>> temperature
>> less than xxx C. Default is 100.0C.
>>
>
> From what I've seen (by Googling "android battery temperature")
> typical idle temps are in the 30-35 range
> (i.e. roughly 10 above ambient temp)
> and under load (running apps and/or recharging) it goes up to ~40.
> 100C would kill any battery, I suspect.
>
On my Samsung Galaxy S2, I see about 25C idle. It goes up to 40C under load
and charging.


> (Note: much of the discussion on the web is in Farenheit;
> let's use Celsius in our discussion).
>
> We need a conservative default policy.
> Possibilities are:
>
> - don't compute if battery temp above X
>   (we need to pick a value for X)
>
I think we should pick a defensive absolute limit for the temperature. 100C
seems far too high, personally I would not like seeing my phone going over
50C.

Is there any resource that can help us taking an educated shot for X?

- don't compute if battery temp is above ambient temp + X
> - don't compute if battery temp is above
>   (starting battery temp) + X
>
Those approaches seem too vague. If the ambient temp is high or BOINC
starts at an already high CPU temperature, we might see devices overheating
anyway.

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