Need Christmas gift ideas? Well, if you know an iPhone 4 user, then Saveology has you covered! They are offering a GP iPhone 4 Power Pack Battery Case for $35 ($99 value)!
As an iPhone 4 user, I personally know how fast apps can drain the battery. There are times when I am running errands and realize that I forgot my charger. Other times, I have my charger but no outlet or computer to charge it with. All the more reason to buy a GP case for myself. :)
The GP case has a built-in 1550mAh rechargeable lithium battery that extends the battery life of your iPhone/iPhone 4S by up to 300 hours of standby time, 40 hours of audio play, or 10 hours of talk time. The case also provides your iPhone 4 with over charge voltage protection, over discharge voltage protection, over current protection & short circuit protection.