No, the battery must be installed. I tried it - with the battery removed, the power light on top stays red indicating battery needs charged, and the side light to indicate data transmitting stays off. I keep my AC charger plugged into the wall, and when the device starts blinking red to indicate low battery, I plug it in for a while. I've had mine for a year now, with heavy use, and am noticing the device gets hotter than I remember after several hours of use. So I plug it in, and place it in front of a small fan to keep it cool when I'm using it for long stretches. Battery still lasts a long time, several hours, though I have't timed it lately.
answered 1 month, 3 weeks ago