Excellent cell For Ni-mh cell, we are using KEJIN A class cell. The KEJIN cell factory is a big factory which OEM for many famous company like Sony & Philips. For Li-ion cell, we choose BYD class A cell. BYD is a famous factory specialized in manufacturing Li-ion cell, and a supplier for Motorola and Ericsson. Safety with PCB The phone battery is with the function of overcharge, over release, over current, short circuit protection, heating protection and zero voltage charge touchable selected circuits, so it is very safety. Meanwhile, the company gives the guaranteed period of 9 months and 12 months respectively, which is the highest promise in the battery packs presently, and will largely relieve the customers. Super quality The capacity of each battery equals to or exceeds the imported battery, the production process is strictly in accordance with ISO9002 international standard. The circulating life of the phone battery reaches above 500 times.