Pure Lead Spiral VRLA Battery (SPB Series, referred as SPB hereafter) is a kind of new type of lead acid battery
independently developed by Jiangsu Shuangdeng Group Co., Ltd. SPB utilizes pure lead grid and special spiral structure
with very high assembly pressure and open valve pressure, which reduces water loss to a great extent. Compared with
normal lead acid battery, SPB has many merits, such as excellent high and low temperature discharge capability, high
current discharge capability, safe, fast charge acceptability. Based on different application fields, SPB has three kinds of
designs: cycle type, Internal Combustion Engine starting type and the type specially for solar cell system.