OK some info about Li battery tech. It does NOT like Deep(i.e. empty and beyond empty) discharge cycles. This adversley affects it's lifetime as well as the electronics it has for charge control.

So it's best to charge Li batteries often. Just top-up charges. I.e. you leave home at 0600 and come to work at 0800 with battery 20% used up since you were listening to music or something. Plug it in and let it charge up. Disconnect after it hits green. Then you might not do anything with the device or you might. Maybe before heading back home plug it in an hour or so before to let it top-up. When you get home top-it up again etc...

That's the normal Li battery cycle and is what it's meant for.

Every so often(maybe every 6 months or so or once per month) do a deep discharge cycle since that will recalibrate the sensors so it will more properly report the charge state. Also it is good to do a few deep discharge cycles at the start of use to calibrate the sensors to again better report on the battery state.