Aside from the above post. I'd check settings for wifi, Bluetooth, NFC and that GPS is on battery saving or off and check if you have Facebook/messager, Google photos (shutterfly, photo apps in general), any activity tracking apps (google fit drains my battery fast) that they are set to upload data/sync on wifi only. Make sure you don't have anything installed that maintains excessive wake locks such as email clients or messaging apps that maintain a constant connection.
I'd also suggest installing "gsam battery monitor" or something similar since they provide a little better information on what services or applications that are running and may be draining.
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