How long does the battery of ZeRound last after a full charge? May 21, 2016 08:00 Updated The internal battery of your ZeRound provides up to 2/3 days power receive: Talk time: 2:30 min Standby time: 3 days Related articles How to customize the display of my ZeRound? How to charge my ZeRound? What does ZeRound track? What is the battery life of ZeCircle2 ? It seems that the number of steps I have done is inaccurate, is it normal?