Battery Health
Hi, I'm using Iphone 6s plus n currently my battery health is 86%. The problem is the battery health is draining pretty fast in a month. Do I need to pay for a battery replacement since it still in warranty?
Have it inspected at an Apple Store or Authorized Service Provider. After checking your device, they'll give you all the available options: Apple – Location Selector
Do not forget to prepare your iPhone to be serviced: Get your iPhone, iPad, or iPod touch ready for service - Apple Support
Regards
Giulio