Hi, I returned the gear 3 and got the Samsung Galaxy 3. I was having issues with the gear watch. The new Galaxy 3 has a much better battery life. I only go on rides about an hour or so long and it lasts fine with plenty of battery left. I don't think it would last for a 10-12 hour ride. But it should last 10-12 hours in watch mode with some ride time etc world use mixed in. I really like having/ watch to see my speed and battery life.