Surely few users already have the First generation Apple Watch or Apple Watch Series 0, but in my case after launching to buy one of the new Apple Watch Series 4, the Series 0 passed to a relative and he complains about the low battery that the watch has (which does not reach the end of the day) so the experience is somewhat negative.
Obviously the watch already has its charge cycles and we are not considering the possibility of changing the battery for a new one, so a solution that has worked very well is to manage and remove saved applications from the Dock that he uses the least or that he does not touch directly. With this, the clock battery "revives" and we can also apply other interesting measures to save a little more battery.
Free apps from the Dock and get more autonomy
The new version of watchOS 5 onwards is different from the previous versions that the original Apple Watch model has, which is why the management is carried out differently as well. In this case, we are going to focus on the first generation, which is the one that can have the most problems when we talk about autonomy.
Recently used apps or up to 10 of your favorite apps appear in the Dock so that when you need them they can be opened instantly and this makes the autonomy of the watch really affected. That is why if you have a first generation Apple Watch you have to avoid having too many apps in this section. For this we simply have to access the Watch application on the iPhone and click on the 'Dock' option. Now we have click on 'Edit' and delete those apps that we do not use on a daily basis. In this way the battery of the watch will increase considerably.
You can also remove spheres from the "My spheres" option that we never use from the iPhone application. In this way we also prevent the clock from having the memory working constantly and we will save battery. Logically, the battery consumption decreases but do not expect miracles, especially if it is a watch that was bought on the day of its official launch.