Oh that's interesting... I have an iPhone 16 right now, and it has a 3561mAh battery. The Librem 5 is currently sold with a 4,500mAh battery... my battery on my iPhone is pretty decent. I just plug it in every night because I use probably just over 60% of the battery every day (just normal use). If I could swap out batteries instead of having to charge overnight, that would be cool. Even to just have a backup with me just in case.