Device manager battery estimate too high

[aphoneowner]

The device manager app needs to be fixed. It creates battery use estimates that are way too high and totally false.

Currently it says my battery will last 4 days and 4 hours. 

The battery has never lasted a full day when I actually use the phone.

After a single day where I don't use my phone much, it creates an extremely high battery usage OVER ESTIMATE that is totally FALSE and totally useful.

The device manager app needs to be fixed. The battery usage needs to be consistent and based on phones being used NOT time spent idle.

It makes up a new fake number every day instead of showing the actual amount of time the battery will last when the phone is being used.

It is currently all LIES AND FALSE ADVERTISING.