1.High capacity and specific energy:A special technique is adopted,the battery capacity and specific energy can reach 100% and 35-38Wh/kg. 2.Low self-discharging:High quality spacer and pure electrolyte are adopted and the self-discharging and water loss and low. 3.Long durability:it can be used for 400 times at the emperature of 25centigrade degrees. 4.Reliability:the streamlined valve is specially designed so that it can make the batter durable and reliable. 5.Airtight structure:The battery can be put on and side except inversion and it is easy to maintain. 6.Optimized design:the special design of the cover makes it easy to maintain and prolongs the durability by 50-100% or longer. Packinge:carton