[AC Question]

I only use gmail but my history says lge.com.email. does this mean someone is using another email provider on my phone

[B. Diddy]

Welcome to Android Central! It's most likely related to the stock Email app on the phone. Unless you were able to Disable it in the Settings>Apps menu, it likely still does something every now and then that uses some CPU cycles, even if it doesn't have any accounts set up.