Is the Mag Safe Battery Pack a Good Idea?

One of the best things about getting a new phone is getting a new cable. I buy anchor ones and some other brands, but we all know that they fall apart. So you either have to buy a newou use use your old, grimy cable, or you have to buy another brick anyway. And most people are going to balk at spending 30 dollars on a charging brick, as they should, because it's obscene. It would make sense if the phone still had a charger, right? Becausede then the argument would be, the only purpose of owning this, this mag safe battery pack,. If you own an ey phone 12, and if you on an iphone