[aprssig] $60 WinBook TW700 Tablet - Power Drain Tests - Followup

Stephen H. Smith wa8lmf2 at aol.com
Tue Feb 10 15:11:44 CST 2015


On 2/9/2015 2:27 PM, JW OH8GEJ julian.white at oh8gej.org [cross_country_wireless] 
wrote:
 >
 > Excellent info Stephan
 > Looking forward to the internal battery runtimes.

I have now carried out two battery-powered runs following full 100% overnight 
charges.   Note that this is a new unit whose battery may not yet be 
conditioned to full capacity by several full discharge-charge cycles.

I ran the test with the display set to 50% brightness which seems to be the 
lowest intensity comfortable for interactive operation. During the tests, I was 
running UIview 2.03, the Precision Mapping V9 server and the UZ7HO Soundmodem 
software TNC running continuously for off-the-air reception on a busy two meter 
channel.   I.e. the sound system was in continuous use by the Soundmodem DSP 
routines.   WiFi was turned on, but no Internet connection was active.

The results:  Just about exactly 4 hours run time before the battery hit 5% 
capacity and triggered an automatic shutdown.  This was a complete 
comprehensive shut down (not a "sleep" or "hibernation" mode).  I.e. when I 
connected the charger and rebooted the machine, the applications that had been 
running were not open.

Over the past 24 hours, I have made extensive revisions and additions to my 
webpage for this device:

-     <http://wa8lmf.net/WinbookTablet>


--

Stephen H. Smith    wa8lmf (at) aol.com
Skype:        WA8LMF
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