iPhone 6s/6s Plus: Fix Battery Draining Too Fast iOS 15 - YouTube
iPhone 6s Charging but not save, Battery connection problem - YouTube
Jak zjistit, jestli má váš iPhone 6s nárok na výměnu baterie [návod] – Letem světem Applem
Will Apple replace the battery on this iPhone 6S although there is a tiny crack on the bottom left corner? Or will they refuse and demand the display to be replaced beforehand? :