That would be an option, albeit an annoyance. I have managed to get through the day just fine on my S21 as my primary and my 7+ as mainly a banking phone without having to take a power bank around. I'm planning to switch to iphone as my primary driver if I upgrade, thus I know battery life becomes an important factor. Having to carry power bank around is annoying and kinda defeats the intention of getting a mini 😅Another option is to use the MagSafe Battery pack with the 13 mini. That‘s my plan for the times when the 13 mini battery alone won‘t last me the entire day (which will only be the case on vacation when using the iPhone for navigation, hike tracking and photos, cause on normal working days I still have 40-50% charge left in the evening).
This guy tested that out a bit:Of course the mini with the battery pack weighs a little more than the 14 PM, but you can remove it as soon as it‘s empty an profit from the significantly lighter phone.
Well, I still have time since the 14 series have not launched in my country yet. Worse come to worse, I'll be looking at the plain 13.