A tip from WMExperts.com describes how to use a freeware program to turn off the LCD screen on your smartphone during calls to save battery power. Click here [11] for the article.
Links:
[1] https://www.smartphonemag.com/cms/category/topics/battery
[2] https://www.smartphonemag.com/cms/category/topics/wireless/cellular
[3] https://www.smartphonemag.com/cms/category/topics/software
[4] https://www.smartphonemag.com/cms/category/topics/software/third-party
[5] https://www.smartphonemag.com/cms/category/device-type/touch-screen-devices
[6] https://www.smartphonemag.com/cms/category/topics/software/third-party/utilities
[7] https://www.smartphonemag.com/cms/category/os/windows-mobile-5
[8] https://www.smartphonemag.com/cms/category/os/windows-mobile-6
[9] https://www.smartphonemag.com/cms/category/topics/wireless
[10] https://www.smartphonemag.com/cms/category/level-sophistication/mastering
[11] http://www.wmexperts.com/articles/howto/tip_of_the_week_month_whenever.html