So, day three and the external battery is still going strong. It did flicker around between three and four bars or circles on its display, and after a little while it went back up to 4 bars. I guess this sort of thing isn’t too precise. Anyway, it charged the iPhone 5 again. I let the iPhone get down to 30% again and charged it back up to 100%.
So let’s see what day 4 brings.