My Sky battery went dead overnight, even though I have the solar panel. After the sun hit the panel, it came back up to 3.52 volts and re-connected to the hub for a brief time. Battery still at 3.5 volts, but rhe RSSI has gone to -127, it was around -60ish before this. Absolutely nothing has changed, hub in same location and Sky in the same location. Air is showing an RSSI of -60, which is about 15 feet below the Sky location. Any thoughts.