Iphone 3g - 3gs and now Iphone 4 batteries

Here is just a few common-sense pointers will help you with a longer battery lifespan and battery life for your iPhone 3g 3gs 4 mobile phone. The most important thing is to keep your iPhone away from heat and out of the sun or a hot car (including the glove box). Heat will degrade your battery’s performance the most.
1 Update to the Latest Software. 2 Optimize your settings. 3 Lock Your iPhone. 4 Use your iPhone Regularly.
Full fitting instructions and toolkit supplied