A faulty or damaged battery can cause a variety of problems ranging from the phone not turning on to a possible destruction of the phone. When replacing the battery it is important to make sure the phone is turned off to prevent any possible loss of data. If the battery is visibly damaged or appears to be leaking stop immediately and take the phone it to a certified repair store to ask for them to dispose of the battery. A battery that appears swollen or to be leaking is a hazard since it can explode or leak and extremely powerful acid.
To remove the rear cover, locate the tab indicated by the red outline.
Using your fingernail, gently pry the rear cover.
The battery can be removed from the phone by applying an upwards pressure to the bottom right edge of the battery, as indicated by the red rectangle.
After the battery starts to lift upwards, use your hand to hold and remove it.