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iRulu 10.1" Model AX105 with Android 4.2




Initial Conditioning of the Battery

The instructions I found said to charge the battery fully, then discharge it fully (during use), and repeat that three times.

I presume that somehow "conditions" the battery for longer life or more capacity or both.

I went to extremes in fully discharging the battery. When the system shut off due to low battery, I restarted it, and let it run down again, and then repeated that several times. Eventually it got to the point that when I restarted the system, the only thing that appeared on the screen was the image of a discharged battery. When I got to that point, I felt I had discharged it fully.

Several times, during this process of fully discharging the battery, I noticed that the battery charge percentage jumped up, sometimes from something like 0 or 1% to something like 3 or 4%. I'm assuming that was the battery charge indicator doing some sort of self re-calibration to become more accurate.

Thus, another function of the full charge / full discharge process may be to allow the charge indicator to calibrate itself. (Of course, as the battery ages, I'd expect it to need re-calibration again--I don't know if there is an automatic mechanism to do that.)

Battery Power Usage Display

There is a display available from the Configuration screen (named "Battery") which shows:

  • (iiuc) the length of time the system has been running on the battery, or, if being powered from the AC adapter, the length of time the system ran on the battery prior to being powered by the AC adapter.
  • major subsystems or functions, and the percentage of the battery used by them in the "current battery cycle" (mcow (my choice of words))

Minimizing Battery Usage

Based on the "Battery" display, you may decide to stop certain functions to minimize battery usage.

If you switch to "Airplane" mode, the system should stop trying to locate cell phone signals.

One question I have (among many others): I stay in airplane mode, as I have no need to either communicate by cell phone, nor do I use WiFi. I've installed a USB 10/100 Ethernet adapter and use a wired connection to my LAN. Nevertheless, "Cell Standby" is very often the major user of the battery. That doesn't seem appropriate.

Aside: as far as I know, the AX105 doesn't have the hardware to communicate via a cell phone, but, IIUC, you can buy a dongle for cell phone communication. I understand that you have to buy an appropriate dongle--I know you'd need either the AT&T compatible dongle or the Verizon compatible dongle, but I get the impression that there is more than that involved in choosing a dongle that will work with the iRulu.


  • () RandyKramer - 2014-02-28
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Topic revision: r2 - 2014-03-06 - RandyKramer
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