Bought a new Spark from Target online (no controller and only 1 battery). I unpacked and started charging it yesterday (attached to the drone using the USB charger supplied with the drone). Also registered it and set up the DJI GO 4 app on my iPhone. The quick start guide said it would take 1 hr 20 min to charge, however I only got 1 light after 2 to 3 hours so left it charging overnight (oops). This morning when testing the charge there are no lights at all. Should I return/exchange the Spark? Other thoughts? Totally bummed.