This will teach you how to make a charger case for any phone. (Note, it needs to be able to be charged through a USB port)

Step 1: Materials

You will need:
1 USB connectable battery
1 phone case for your phone
1 short charger cord for your phone
A way to secure the battery to your case eg; super glue, Blu tack etc.

Step 2: Connecting the Battery

By using whatever you have chosen to connect the battery to the case, stick it to the case and make sure it is firm

Step 3: The Cord

Take your short charging cord for your phone and plug it in to the usb port on the battery if the battery has a keyring (like mine) just put the wire through the keyring