Purchased my HS-720 on July 3rd. flew it a couple times and it seemed like the batteries really had no life the last time I actually was able to fly at all on Sunday early morning. Charged batteries from 8 am until 5 pm, looked like they were still charging, but figured I would take it to the park near the dunkin donut by me and show a couple friends.... it flew for barely 3 to 4 minutes on either battery. Was able to contact Amazon customer service, and they agreed to send another complete unit, unfortunately even though I paid for rapid shipping when I originally bought it, they didnt provide that, so it will not arrive until tomorrow sometime. Almost seems like the battery charger forgot how to charge, because I have a difficult time believing both batteries can be no good in three flights. Does Holy Stone have known issues with their batteries and charger? I know I am not too impressed with the charging system and time it takes to charge.... but hopefully this was just a defect, and not likely gonna do it again shortly. Also thinking about purchasing the DJI Mini SE, if anyone has any experience with that model from DJI.