But after installing the battery, I realized that it is not loaded from the iPhone 3GS (the battery icon comes instead of a flash just a plug).
Very fast (2 days) I got to the complaint a spare battery, which unfortunately showed the same behavior.
Have then without hesitation get my money back, but unfortunately no function replacement battery.
Maybe he works in Iphone 3 (as described).
The 2nd star for a quick and correct service, although the product is not working.