Apple

I just upgraded to iPhone 15 pro and I’m camping in the bush and none of my portable battery chargers are working! This is a disaster. Is there anyway to make it so a portable charger can work? If not what’s the portable charger I can buy for iPhone 15 pro? I’m very inconvenienced by this. I ordered a portable MagSafe click on but it won’t come in time. Is there a portable charger I can buy that will actually work on iPhone 15 pro! Any help regardless of what will be heavily appreciated! I can’t run out of battery 🪫 in the bush I am very scared.