What is the relation between processor strength/cores and heating of battery in Android tablet?

DrSunil Vaswani May 8, 2013
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What is the relation between processor strength/cores and heating of battery in Android tablet? How does it affect battery heating? The profile of device in question is at http://www.fonearena.com/hcl-me-am7-a1_1663.html

  1. Rajaa Chowdhury
    May 9, 2013 at 3:27 am

    All the above explanations are pretty good and sums it up. I do not think I can value add further to it, Sunil. :D

  2. DalSan M
    May 8, 2013 at 10:38 pm

    Heat is produced more when the processor is stressed, the GPU is stressed, or the battery is stressed. Wattage being used is a part of heat generation, but it's more about how heavy the hardware is used. A single core processor trying to multitask its going to use more wattage because the processor will be stressed more than a multicore processor. The higher the processor is being used, the more battery juice is being used, thus generating heat from both the processor and battery. Undervolting the processor, which requires root access, can reduce some of the heat being generated by both the processor and battery. Charging the battery will produce heat as well.

    • DrSunil Vaswani
      May 15, 2013 at 4:58 am

      Can any apps avoid battery draining/heating in single core tab

    • DalSan M
      May 15, 2013 at 4:37 pm

      Doing what you are asking is quite difficult. Task managers and killers can create more issues and work for the processor if you are not careful and kill the wrong process. Battery saver apps may help some, but may cause the device to slow down and make it more difficult to handle normal tasks.

      The main usages that will cause a device to heat up quickly are GPS navigation, heavy usage of Wi-Fi and internet such as downloading files or streaming media, and playing games that are graphics intensive.The best advice to follow is to minimize the extent that the processor and battery would be stressed for extended periods of time. Some processors handle stress better than others, and some devices are built to handle heat better. Here are some causes and prevention tips that may help you. http://techpp.com/2011/08/18/android-heating-issues-causes-and-how-to-avoid/

  3. Oron Joffe
    May 8, 2013 at 10:33 pm

    Battery heating is related to the the total amount of power drawn. Processor speed can be increased in three ways:
    Better design of the basic circuitry (but all ARM processors are essentially the same).
    By increasing clock speed or
    By employing multiple processors ("cores") which will work in parallel.

    All things being equal, a higher clock-speed processor would require more power than a lower speed one (power consumption is proportional to the square of the clock speed), and a dual core processor would require twice as much power as a single core.

    However, all things NOT equal at all! ARM processors can speed up or idle depending on processing load, and cores in a multicore ARM processor can be "shut down" when not needed, so power consumption can be kept to a minimum. A quad-core processor is in fact more power-efficient than a single processor in most situations (indeed, this is one of the reasons why multicore processors became relevant on smartphones). When the phone is working hard, well, you would need to compared the figures for each processor, but most of the time, a phone is either idling or not working very hard, and in those situations a multicore processor is very power efficient (since some of the cores are switched off), and the battery shouldn't heat up at all, or only very little.

  4. ha14
    May 8, 2013 at 9:17 pm

    Cortex-A8 Processor, Single core only needing operation in less than 300mW
    http://www.arm.com/products/processors/cortex-a/cortex-a8.php
    has the ability to scale in speed from 600MHz to greater than 1GHz.
    i think the battery heating is more like hardware problem, now if your processor is kind of overclocked under full load will ask more power from battery this can cause heating also perhaps not enough room to dissipate heat

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