Purchased three of these beacons and tried them out upon arrival and after charging. All worked great. Yesterday my Miss Chrissy mounts arrived and when I went to test them again, none of them would even power on. All I get when I hit and hold the power button is a momentary pale blue light and then nothing on all three. Recharged all three and they are all as dead as doornails. Any similar experiences? Love the product - when it worked.