Do you know how teenagers keep their phones alive? So is how I keep myself alive.
Teenagers recharge their phones every time they can. They plug the charger to the power for short periods of time. (Someone can say there is no problem because of the lithium batteries, someone just don't care. I don't believe lithium batteries manufacturers by the way. But lithium batteries are another matter).
Now, think sleeping is like recharging a battery. That's it.
Fortunately, I don't shut down like phones. I wonder how long I'll be ON. Someday I'll know.