Having lost two or three readings because the battery voltage was on the lower limits when the recommend mode was started. This meant that as the monitoring progressed the battery voltage dropped below a usable threshhold and the monitoring was lost. To look at the battery voltage requires one to open the upload screen and view its measurement. My suggestions would be to have the program check the voltage during upload, or some other stress point, and alert the user when the potential for battery failure is present.
Thanks
Rick