If you only need to swap it out once every few years it seems like a huge waste to have a removable plastic door and separate housing taking up space. It's not

If you only need to swap it out once every few years it seems like a huge waste to have a removable plastic door and separate housing taking up space. It's not too difficult to swap an iPhone battery yourself. iFixit has detailed instructions, but there's a bunch of mall kiosks or small shops that will do it for you in an hour and around me they only charge around a $30 premium ($110 total) more than the cost of the battery ($89) (I was comparing an iPhone Xs). With the iPhone 4 it was literally removing 3 (sadly proprietary) screws and something like a guitar pick to safely pry it out. Those replacement batteries sell for $11. With newer iPhones, because of waterproofing there are more sealing adhesives and to make room for the stretch-tape you might have to pop off a few components.