Can the iPhone 7 Plus battery be damaged by the use of an external battery charger? When I bought the iPhone 7 Plus, I also bought a Mophie External Battery Charger, the Powerstation 2, I haven't used yet, so far the iPhone battery lasts long enough for me, but I read on an article that external battery chargers are one of the reasons cellphones' batteries get damaged. Is this true, or it's only with certain chargers?
I bought and used an external battery charger on mu iPhone 5s and believe that it did damage my phone's battery. I now get only a few hours of power before the phone is depleted. This happened directly after using the charger for a week.