I am charging my S10e phone on usb port of pc very slow overnight.
Pluged it in 11 pm and it says 7 hours to complete charging. When i wake up battery is full. Not standing long time full on charger.
Also using fast charge when needed..
Phone counts charging cycles.
Number of cycles is lifespan..
Phone info apk:
Theory says it'd take 7.47hrs for 0-100% charging.
The supplied 15W charger with S10e would take ~78mins only.
LiPo batteries won't last longer with slow/trickle charging or any other advantages in this choice of overnight charging of yours.
Far better for your S10e LiPo Battery will be 10-80% charging which will take ~43mins. I'm sure you can find 43mins in ~16hrs of Your awake period for charging.
Your PC has to be ON (maybe doing something useful); it can't be even in Hibernation.