Do you want to maximize your iPhone 3G’s battery life? If your answer is yes, then here are some ways for  doing it.
1. Turn off 3G
If the 3G feature is not crucial for you, then you could turn it off. For doing it, just follow the steps given below.
1. Go to ‘Settings’, ‘General’ and then ‘Network’.
2. Now you can turn off 3G.
2. Turn off Location Services
Location services could turned off to maximize your iPhone’s battery life because applications like maps use more power. Here’s how to do it.
1. Open ‘Settings’ and select ‘General’.
2. Now turn off the ‘Location Services’ option.
3. Turn off Wi-Fi
1. Go to ‘Settings’ and select ‘Wi-fi’.
2. Now turn off ‘Wi-Fi’.
4. Turn off Bluetooth
If you are not using bluetooth, then turn it off to increase your battery life. The below instructions could do it.
1. Open ‘Settings’ and select ‘General’.
2. Now select the ‘Bluetooth’ option and turn it off.
5. Switch to Airplane Mode
In low range areas, your iPhone might be enthusiastically searching for cellular networks and this could lead to great battery life loss. In these circumstances, you could turn your iPhone to Airplane Mode. I’ll tell you how to do it.
1. Just go to ‘Settings’ and turn on the ‘Airplane Mode’.
6. Turn Push feature off
The ‘Push’ feature in your iPhone is set by default and your iPhone will get the emails whenever a new mail comes. But you don’t actually require it. Do you could turn it off.
1. Open ‘Settings’ and select the ‘Fetch New Data’ option.
2. Now you could turn off the ‘Push’ feature. You could also set how often your iPhone should fetch the emails. You could also use the ‘Advanced’ option to set different fetching options for different email ID’s.
7. Turn off Vibrate option
You could also turn off the vibrate feature to save power and maximize your iPhone 3G’s battery life. Here’s how to do it.
1. Open ‘Settings’ and select the ‘Sounds’ option.
2. Now you could turn off the vibrate feature.
8. Reduce Brightness
You could also reduce your iPhone’s brightness to maximize your iPhone’s battery life. Here are the steps.
1. Go to ‘Settings’ and select the ‘Brightness’ option.
2. Now you could reduce your iPhone’s brightness.
9. Turn off EQ
Applying EQ could use a lot of the battery life. So you could turn it off.
1. Go to ‘Settings’, scroll down and select ‘IPod’.
2. Then select ‘EQ’ and you could turn it off.
10. Turn on Auto-Lock
You could set the ‘Auto-Lock’ as it prevents your iPhone from using more power when you are not using your phone. This is how to do it.
1. Go to ‘Settings’ and select the ‘General’ option.
2. Now select the ‘Auto-Lock’ option and set its time.
A Simple Tip for maximizing your iPhone 3G’s battery life
You should do this atleast one time in a month. Charge your iphone to full charge and use up all that charge. It’ll help to maximize your iPhone 3G’s battery life.

Do you want to maximize your iPhone 3G’s battery life? If your answer is yes, then here are some ways for  doing it.

1. Turn off 3G

If the 3G feature is not crucial for you, then you could turn it off. For doing it, just follow the steps given below.

1. Go to ‘Settings’, ‘General’ and then ‘Network’.

2. Now you can turn off 3G.

2. Turn off Location Services

Location services could turned off to maximize your iPhone’s battery life because applications like maps use more power. Here’s how to do it.

1. Open ‘Settings’ and select ‘General’.

2. Now turn off the ‘Location Services’ option.

3. Turn off Wi-Fi

1. Go to ‘Settings’ and select ‘Wi-fi’.

2. Now turn off ‘Wi-Fi’.

4. Turn off Bluetooth

If you are not using bluetooth, then turn it off to increase your battery life. The below instructions could do it.

1. Open ‘Settings’ and select ‘General’.

2. Now select the ‘Bluetooth’ option and turn it off.

5. Switch to Airplane Mode

In low range areas, your iPhone might be enthusiastically searching for cellular networks and this could lead to great battery life loss. In these circumstances, you could turn your iPhone to Airplane Mode. I’ll tell you how to do it.

1. Just go to ‘Settings’ and turn on the ‘Airplane Mode’.

6. Turn Push feature off

The ‘Push’ feature in your iPhone is set by default and your iPhone will get the emails whenever a new mail comes. But you don’t actually require it. Do you could turn it off.

1. Open ‘Settings’ and select the ‘Fetch New Data’ option.

2. Now you could turn off the ‘Push’ feature. You could also set how often your iPhone should fetch the emails. You could also use the ‘Advanced’ option to set different fetching options for different email ID’s.

7. Turn off Vibrate option

You could also turn off the vibrate feature to save power and maximize your iPhone 3G’s battery life. Here’s how to do it.

1. Open ‘Settings’ and select the ‘Sounds’ option.

2. Now you could turn off the vibrate feature.

8. Reduce Brightness

You could also reduce your iPhone’s brightness to maximize your iPhone’s battery life. Here are the steps.

1. Go to ‘Settings’ and select the ‘Brightness’ option.

2. Now you could reduce your iPhone’s brightness.

9. Turn off EQ

Applying EQ could use a lot of the battery life. So you could turn it off.

1. Go to ‘Settings’, scroll down and select ‘IPod’.

2. Then select ‘EQ’ and you could turn it off.

10. Turn on Auto-Lock

You could set the ‘Auto-Lock’ as it prevents your iPhone from using more power when you are not using your phone. This is how to do it.

1. Go to ‘Settings’ and select the ‘General’ option.

2. Now select the ‘Auto-Lock’ option and set its time.

A Simple Tip for maximizing your iPhone 3G’s battery life

You should do this atleast one time in a month. Charge your iphone to full charge and use up all that charge. It’ll help to maximize your iPhone 3G’s battery life.