What is the best replacement battery for iPhone 5s
I would buy an replacement battery for your iPhone 5s from iFixit. They provide also the tools to replace your battery. It's a trustworthy company. Worked with their parts/tools many times.


  COMPATIBILITY
  
  All iPhone 5s Models (Not iPhone SE, 5 or 5c)
  
  SPECIFICATIONS 
  
  Voltage: 3.8 
  
  Watt Hours (Wh): 5.92 
  
  Capacity: 1558 mAh
  
  Apple Part #: 616-0718, 616-0719, 616-0720, 616-0721, 616-0722,
  616-0728
  
  WARRANTY 
  
  One Year Warranty - This iFixit product is guaranteed to
  function for one year.


I do not have financial ties with iFixit!