I had those issue last night, charged watch to 95% at midnight and by 10am the watch ran out of battery and shut down. I have reset it (what a palaver that was as you lose all your purchased watch faces) and the watch is still listing battery at an alarming rate. Beginning to wonder if this watch is not up to scratch which is crazy for the price it was. Nothing much I can do about it today but I will be onto Samsung after the holiday and probably wanting a refund.