My PowerBook G4 still makes 30 minutes playing podcasts, so there's that! No idea what its 20-year old battery pack health is though!
I don't use my main phone, a Samsung Galaxy S Relay 4G (Gee, T-mobile, what a mouthful!) as a bedside clock but it takes so little time to charge it every evening (like around 90 minutes max from 50% after a day at work playing music) that it sits in my bed cubby doing the job of an alarm clock, well, my second alarm if I choose to sleep in. I got an old Galaxy Note doing the 6:30 alarm, which I can say 'STOP' to dismiss it without touching it, while the S Relay is my 7:30 alarm if I chose to sleep another hour.
I don't use my main phone, a Samsung Galaxy S Relay 4G (Gee, T-mobile, what a mouthful!) as a bedside clock but it takes so little time to charge it every evening (like around 90 minutes max from 50% after a day at work playing music) that it sits in my bed cubby doing the job of an alarm clock, well, my second alarm if I choose to sleep in. I got an old Galaxy Note doing the 6:30 alarm, which I can say 'STOP' to dismiss it without touching it, while the S Relay is my 7:30 alarm if I chose to sleep another hour.