You can purchase batteries with toolkits from amazon here: \rbr\rbrHey all - this is a tutorial on how to quickly replace your iPhone 5 Battery. \rbr\rbrCommon problems with a faulty battery is it losing charge very quickly and jumping from say a high percentage of charge to 1 of charge. If this is the case you may still want to look to see your charger is not faulty by trying another charger. \rbr\rbrIf you have any questions, please ask.