A:AnswerAbout 90% once. If your phones fully dead, the MagSafe option won’t completely charge the phone. If you’re looking for a heavier duty battery, or more charge if you will, then I suggest, maybe selecting another option! Great product, just not much longevity.
A:AnswerIt has to be a "MagSafe Compatible Case" because the case would have magnets built into it to hold the MagSafe Battery in place, but there are lots of "MagSafe Compatible Cases" out there.
A:AnswerThe easiest way to tell when you need to recharge it is by adding a widget to your home screen that has the battery levels to your iPhone as well as other things you have connected via Bluetooth such as your Apple Watch AirPods and when connected your battery pack if you don’t wanna do that way you can do is if you have iOS 14.7.1 or newer when you connected there would be there’s animation where it shows the battery percentage of your iPhone and under that the battery level of the battery pack as shown in the picture :)