I just got the new iPhone 15 Pro Max and it is way bigger than my old one! People keep telling me about this MagSafe thing on the back but honestly I have no idea how it works or what I should actually buy for it. Is it just for chargers? I spent so much on the phone that I only have maybe 100 bucks left for accessories right now. I am going on a long road trip to Oregon next Friday and really need something to hold my phone in the car and maybe a battery thingy so it doesnt die while I use the maps. Sorry if this is a super basic question but what are the actual best MagSafe things I should get first?