Last Updated: Nov 15, 2013
Answers to some of your questions about your Apple iPhone 4 battery
Your battery has a maximum talk time of up to 7 hours continuous use.
How fast your battery runs down depends on what you do on your Apple iPhone 4. Features like Bluetooth®, games, and web browsing put more strain on the battery than simple features like voice calls and text messages.
You can lower screen timeout and brightness, turn off idle radios and apps, use Wi-Fi whenever available, and limit your email updates and application notifications.