Any battery that has an even moderately intelligent chip moderating its charge will round-robin the individual cells so that it’s not the same cells being charged/discharged all the time.

If you’re always topping off the charge at night, the cells in the battery pack are still experiencing full discharge cycles eventually. (Cells will end up staying at 100% charge for a while though, which is probably ultimately bad for them, but they should still be fully discharged/charged eventually…)