Bit of context. Hearing impaired student here who needs a vibration alert that gives me a sense of time. Usage is limited to pomodoro timer to pace myself whilst studying and having sense of time (waking up, routines etc. Essentialy heavy usage for 24 hours)
 History. Have used the apple watch, but not quite satisfied with it. The daily requirement of having to charge can be quite of a hassle and sometimes, I would just simply forget to charge it. Throws me off my daily routine.
 With regards to the GD-350, can I ask if anyone has used this watch before in the same manner as described under  - wondering what is the longevitiy of the battery life? From what I read - the manual states that 10 years based on use prescribed therein.
 Ideally, would be nice to have a solar powered one so I can avoid asking my friends for assistance (to change the battery), would like to have some independence.
[ps] Have researched a similar product (gymboss), but the problem is it is not waterproof. (would like to to wear the watch 24/7 without any care or concern)