Decent battery

Battery meet Apple standards despite a slightly longer connector.
Well packed and delivered quickly, as usual with Ama 'for me.
She is detected, recharges as planned, installed in 5 minutes.

Only downside:
The battery seems a bit old, knowing it is recommended to keep the charge at 50% and was 5% during installation. I would have liked a newer product for greater autonomy.

Warning:
Do not expect miracles on an iPhone 4 or 4S on iOS 7. The system itself because of the leak, new battery or not, which seriously reduce the battery life, especially when your 3G is activated.

Some tips though:

To perform the first charge:
Install your new battery, leave the iPhone charge up to 100% and without using it. Drain your iphone until your battery is
To improve your independence: Disable 3G as soon as possible (it is she who has major impact on the batteries of our old iPhone 4 or 4S on iOS 7) will activate the WiFi and / or Bluetooth only when necessary, not not use the effect "parallax", disable the refresh applications in the background, use location services only when needed (Apple Maps, Google Maps, etc.), disable automatic updating of applications (especially via 3G), disable automatic lighting and finally switch to Airplane mode if necessary.