Just got the scanner and ran it with new batteries for around one hour. Suddenly I heard a click and the unit shut off in mid scan. Would not turn back on. Replaced batteries, reloaded SD card with clean info after deleting old data. Updated everything. Put SD card back in unit. It turned back on and ran again for about 45 minutes then again during scanning, the unit shut off with a click sound. Tried same things as before, but not will not turn back on again. Will be shipping back for refund on Monday. Has this happened to anyone else?