I pulled my SkyTracker Pro out yesterday, and plugged it in to charge. This morning, there was no LED charge indicator light on...so I turned the unit on, and the LED flashed at the "high rate" (approx 0.5Hz according to the manual), which indicates the battery charge is low. Now I'm getting a little concerned, as last night I tried three different USB -> Micro USB cords on other devices that have a more obvious "charging" indicator, just to ensure it wasn't the cable or a connector. I was hoping to use the SkyTracker next week when the moon is in the later half of waning. Any thoughts/suggestions/ideas of what else I can try?