I have just obtained the Galaxy Watch 4, was on charge all night last night. It has lasted until 14:54. I have turned off the automatic workout detection, heart rate, ecg etc. NFC, Bluetooth and WiFi also off. All that's been functioning is the LTE, step counter, music control (which was only going for my morning commute, roughly an hour and a half) and WhatsApp notifications. I genuinely cannot believe its dead already, after half a day. Is this normal? If so, I will be sending it back. Its currently on my wrist as a dead gadget. I was very excited last night, and bitterly disappointed this afternoon.