Shenzhen Pengchu Industry Co., Ltd
All 18.5V laptop adapters are 100% brand new, and for the main brand laptop such as HP, Dell and so on. all the laptop chargers have over voltage protection, over temperature protection, short circuit protection, and all the laptop adapters are 100% aging test before shipment. Anyway, if you still worry about the quality, you also can place an Assurance Order in Alibaba, you will get 100% full refund if bad quality or delay delivery. This service is designed by Alibaba to create trust for trade.