A lot of folks have been complaining about the battery life of their iPhone 4 / iPhone 4S while running iOS 6.
Here’s a quick tip to lighten your iPhone 4’s battery load.
The Quick Tip
Go to Settings > Privacy > Location Services > System Services
Now, turn off everything except the “Cell network search”.
Most of us won’t be using the rest very often. By default, those settings are on, and it consumes a lot of battery power without many of us knowing it.