The old man has a 6s that is due for a battery replacement, it will turn off with around 20% charge left. He took it in to local apple service provider and they sent it off to get the battery replaced. He got it back a few days later and was told there was water damage and they would not replace the battery etc etc unless he paid ~$600 for a complete fix (referb?), and charged him a $50 fee for doing so.
He went to spark, who he originally bought the phone off and asked if they would replace the battery. Unfortunately for him the sales guy had zero interest in helping so he left.
So we're looking for any recommendations for 3rd party to replace the battery, or somewhere I can buy a battery and do it myself for him. He is in Nelson but regularly is in Auckland.