Maximal Power Internal Battery for iPhone 4 and 4G with Tooling Kit (iPhone 4G-IB) Amazon.com is the only authorized dealer selling MaximalPower brand products. Please make sure your item is ONLY sold and shipped by Amazon.com! All other marketplace vendors are selling counterfeit products that do not perform the same, and/or are not covered by our MaximalPower Warranty 1 Year Warranty Compatible with iPhone 4G Installing tool kit is include 1 Year Warranty Compatible with iPhone 4G Installing tool kit is include