i am planning to buy a battery pack for HTC one x. i have never used anything like that on any phone. can you people share your experience. i will buy from www.ebay.co.uk . any suggestions on how to use it and will it harm my phone. and the phones battery will not improve right? i just get to charge it whenever i want to? thats the main idea right? i wish there was a bigger battery for HOX and could open the back cover.