How to replace a battery

@uriebudi any proper battery for your phone will always be made of 2 parts. That is done so that you actually get 5000mAh from this battery. No matter what, you need a BN5E for your phone. As for changing it, iFixit does not yet have a specific guide for that. Use the one from here It was written in Spanish so use a browser that does the translating for you, if needed.

While you work on your phone, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has a device with the same issues as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.

Repair is War on Entropy!