About SIMPLO battery manufacturer

You may find reports that Apple uses many different battery manufactures including Simplo even on the same device model. This does not mean you will be able to purchase the Simplo battery and not expect problems with your iPhone recognizing it. Apple uses the battery along with their own monitoring chips to create a battery module to use on their devices.

If you are looking to replace the battery, just spend the $89(US) to have the battery replaced by Apple with genuine parts. It also comes with a warranty and you will not have to worry about your battery health indicatory not working or warnings in Settings about non-genuine parts.

iPhone Battery Repair & Replacement - Apple Support

This is a user to user only forum, so we are not privy to who Apple gets parts from. If you are looking to replace the battery in your iPhone however, do NOT buy one from anyone. Apple doesn't sell authentic parts. The only way to get an authentic Apple Battery for iPhone is to pay Apple or an actual Apple Authorized Service provider to replace the battery. If you try to do it yourself or let some 3rd party ifixit type business do it, you WON'T get an authentic battery and features such as Battery Health will never work again, plus your phone will forever display a message saying there is an unauthentic part installed. AND, the phone will have no trade value with Apple, nor will Apple ever touch an iPhone which has been tampered with.