Hi @aj081 ,
Changing a 2 year old battery is the quickest way to eliminate it if it is the problem. Even rechargeable batteries have a life span.
Back up your phone before you do this, in case anything goes awry with the repair.
Here is a link to the ifixit Motorola Moto X Pure Edition Battery Replacement guide, which should be of some help.
Batteries are available online. Just search for Moto X Pure Edition battery to find suppliers that suit you best.
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