A battery pack that retains eighty percent (80%) of its original capacity after twelve months is considered normal. We shall not be held responsible for the improper use of our product(s). We specialize in batteries, adapters and other accessories, more than 10 years experience.All of our items have passed strict quality assurance procedures such as CE, UL and ISO9001/9002 certifications. The products are exported to North America, Europe, Australia, Japan, Russia and other countries and regions. The company has been devoting themselves to improve the user experience, focusing on the upgrade of the overall sales skills and service, as well as expanding their international market share year after year. The company adheres to the business philosophy of "innovating ideas, pursuing excellence, rapid improvement, sustainable management", and takes "quality is the first work", "the satisfaction of customers are our honor" as the eternal quality policy. The item "Genuine 7.4V 37W VGP-BPS31 battery for Sony Vaio Duo 11 SVD1121Q2EB SVD11223CXB" is in sale since Friday, March 2, 2018. This item is in the category "Computers/Tablets & Networking\Laptop & Desktop Accessories\Laptop Batteries". The seller is "good-batteries" and is located in HK. This item can be shipped worldwide.