One thing about this battery is that it's small but powerful. In fact, it's the most powerful battery of its size available. Keep it in your pocket, purse, or briefcase, and snap it on to keep going all day and night! You can charge while simultaneously using your iPhone. You can charge both the battery and the iPhone together.
Ours is the only one that is a high-quality aluminum case, which is light, but extremely tough and virtually scratch-proof.
One of the best features of this product is that at night, you snap the battery and iPhone together, and charge them both with the included charger. You'll wake up in the morning with both fully charged. So you are getting a wall / USB charger for free. When you travel, you don't need the Apple charger. Just take this one.
Of course, it works for all models of iPhone and iPod, except for iPod shuffle.
This is a great accessory to keep with you all the time. The polymerized lithium-ion battery can be recharged over and over again for several years and will not develop "memory". There are three color LED lights to show you the status of the charge. However, please remember to charge it completely for the first two nights to make sure the lithium-ion battery gets to full capacity!
The battery costs $49.95.