.Occasionally charged to 100% which I gather you shouldn't, occasionally run down to 5 or 10%, which I gather you shouldn't...and while it was in regular use by my son, he'd invariably use Turbo mode which of course drains the battery quite quickly...overall, not careful use of it.
There’s no problem at all with occasionally doing that. I charge up my Gain to 100% before a long ride but don’t store it for long at 100.