Mystery package came today

what do you mean?
In a lot of ways its a simple charger, put in battery, select current wait for beep (and try to avoid the temptation of hitting display every second to pretend its a heart monitor) :smiley:

Only new observation is a confirmation that the first few seconds after you plug it in it acts like its dead before suddenly springing to life. I think it should spring to life right away and count up to 100% ready to use

Edit:
Sorry, i thought you had posted this on this thread, has my first impressions