1:high-quality a grade cells, cycle life more than 500times, 100% check capacity(0.5c standard) and impedance when cells arrived 2:all the cells must be strictly tested before manufacturing. 3:both chinese cells and the japanese cell are available 4:the most important( the protection ic can protect the battery from over charing, over-discharging. Short cut. And recovering after a short cut authentically) 5:high-quality soft pcb board. 6:drop testing:more than 20times 7:the warranty is 12 months. Our dropping test, 40times no broken.Please check the video on link: Standard box of power time
