I have a Galaxy S2 with ICS.
When I use it in my car, while it is charging from a car charger, I occasionally get this popup:
"Charging paused. Battery temperature too high"
Also Waze is running while this happens.
- Is there anything I can do to prevent this from happening?
- Does this indicate that my car charger is defective?
Answer
Your charger is fine. Only your phone is running hot due to heavy usage.
Your phone has a few components that dissipate heat if heavily used:
- The processor when used heavily by an app (yours has 2 cores)
- The graphics chip when your app uses OpenGL (also for screen composition)
- The display when lit (depending on the brightness)
- The battery itself (when charged or discharged heavily)
- The modem also needs rather much power for 3G/4G/LTE data transfers
If this all above leads to a high battery temperature a safety mechanism kicks in for security reasons (LiIon battery technology needs this supervision, you may have heard of burning or exploding consumer tech)
Reasons: It's mostly a mix of all things above. Maybe it's also a bad programmed app (requires too much computation, keeps CPU awake, etc.).
What you can do:
- lower screen brightness
- underclock your CPU via SetCPU
- Is Force GPU rendering in the developer settings enabled? If so, disable.
- Try another app or file a bug report for waze (maybe)
- Does the app work also when the screen is off (I'm not sure what it does, maybe it has speech output that doesn't require you to look at the screen)
- maybe it's due to your model (I heard the i9100G generates more heat)
- Switch to 2G only in the mobile networks settings:
Settings->Wireless&networks->more->Mobile networks->Use only 2G networks (saves battery)
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