Pay attention not to exert too much stress to the battery or puncture its surface, as this may cause it to catch fire!

As with the glued-on top, you can heat up the back a little to ease the process - if you are using a heat gun instead of a hair dryer, pay attention that the battery does not get too hot

You can see in the second picture that there are three glue strips under the battery. You can see from the arrow where you can insert your plastic card - which should have rounded edges as not to puncture the battery!

Once you feel like you have loosened all the glue, you can gently remove the old battery