Salam brother I am so sorry I just read your mention and question . No brother this charger does not damage the integrity of battery as its certified and designed to work with devices having Qualcomm Snapdragon 810 and 805 chipsets. These chargers are designed with high grade materials and capacitors and their circuits are so balanced and strong that they amplify charging to faster levels without damaging the battery. I am really happy to have this product and this charger is so good that even other people in my home charge their cellphones with it now including iPhones. This is the best thing they have designed and cheap as well.hi bro, does this fast charging not affect the battery life negatively?