They’re not like other battery packs which emulate a socket charger and just charge the battery up nonstop. Think of it more like a battery extender to use for keeping the battery % high and charged on days you know will be battery-intensive, it kind of ‘drip feeds’ the battery to keep it at a higher level this way.

Its weird at first because we’re so used to using these kind of things when the phone’s low, but with some thoughtful use you’ll get a lot more out of it this way and it’s better for battery health long term!

Hope that makes some sense!