AppleInsider reports that some complaints have emerged on Twitter about the Apple Watch’s patchy power consumption when the watch is being used to track workouts, especially for outdoor activities such as cycling, possibly due to the use of the paired iPhone’s GPS.
Officially, Apple says that the Apple Watch battery should be able last for up to 6.5 hours during a non-stop workout. In many cases, this is true; however, AppleInsider has seen reports from some users who say that the actual time has been much less.
One reader said that he had only got two hours of battery life out of his watch when cycling. And while many other Twitter users had nothing but praise for the watch’s battery life when they were exercising, another Twitter user said that his watch’s battery power had fallen 13% in just 34 minutes of exercise. Another cyclist said that his Watch battery power fell to 29% after a little more than 3 hours of cycling.
The heart rate sensor is apparently a big drain on battery power, but Apple does offer a Power Saving Mode in the Workout section that could solve the problem.