There's certainly a misunderstanding in progress...
Ok let's have a summary:

- In Settings, Location has to be Enabled: this means that apps can use it when they need it. It does NOT mean that GPS is costantly searching for your position. Having it enabled keeps your battery full, don't worry.

- When GPS is working, so that it's searching for your position, a Satellite-looking icon appears in the status bar. So, when you see that icon, GPS is working and draining your battery.

Nothing more.