I don't own an iPhone, but I've heard that replacing their battery is quite expensive. In Europe, it costs about 150 euros to replace the battery on an iPhone X. I think it's about the same in Australia. I don't think it makes sense to do an iPhone battery replacement. Much easier to sell and buy a new phone. The performance of the iPhone battery is feeble and used up quickly. That's why I always use android. But trouble happened with my battery. I didn't charge the phone correctly, the battery got very hot, and it needs to be replaced. I found a service that replaces the best lg g5 battery. I hope that everything will work and I will use my phone further.