Hi there and welcome
Can you please go on the device to Settings, Applications Manager.
Switch to the list ALL and locate Google Services Framework.
Press it and press Clear Data.
Then Google Play Services
Let this complete and when it has, restart the phone and tell me how the battery now operates please.
No, this is only system information Steve, as its a system app.
ok, we will need to do a factory reset of the phone then.
First, backup any data from the phone off it as this will remove all data.
Then go to Settings, Backup and Reset
Then choose Factory Data Reset.
Once done, setup the phone again and tell me how it now functions please.
best to do to PC