Brand new Charge 5 and the battery lasts a day. I charge in the morning and wake up to find the battery is low and drained 30% overnight in sleep mode. I've turned off everything I can so it's now just a boring device. Forums suggesting it could a bug with GPS staying on or the Sp02 app. So I've deleted Sp02 and GPS is set to phone. I'm really disappointed, hope today's update fixes this issue...