We are a long-standing lithium battery manufacturer that offers powerful and durable products to customers from global market. Your devices will have high performance when powered by our high-capacity batteries. In this product, every battery has individual cell for safe storage and long shelf life. Please follow instructions on the back of product package to properly use and store batteries. Under good storage conditions, our batteries hold 100% power for 3 years. A Best If Used By Date is specified on the back of product package for your reference. Please feel free to contact us if you have any questions about our products. We will provide product support any time if you ask. We also welcome you to share user experience with the community by writing product review!