1.We have a 370 workers- factory in Shenzhen. Main of our products are Replacement Laptop battery and adapter. All of them we make 1 year warranty with full testing before delivery. 2. we have 8 sales-team with very good skill for trading, we will make the prefect services for every customers. 3.we join the IFA, CES, HK FAIR every year, you can come to visit our booth then. 4.Reasonable price for you. we make a suitable price for each customer one by one. you will select the products under our suitable suggestion, save money, delivery fast are our working rules. 5. welcome to log on www.e-colourstone.com or come to visite our factory.