If your iPhone 6s battery is low, you may need to replace the charger port. Here are some tips on how to fix the charger port on an iPhone 6s:

  1. Open the phone case and remove the battery cover.
  2. Look for a small black connector at the bottom of the phone case. This connector is called a “charger port.”
  3. Pry off the old charger port cover by using a sharp object or a fingernail. Be careful not to cut into the phone case too much as this will likely cause further damage to the port and battery cover.
  4. Put new charger port cover back on and reattach battery cover.