The speciality of the products Design service life: 12+ years (20oC). High-quality colloid is confected from silicon dioxide, so electrolyte's distribute is symmetrical and no phenomena of delamination of electrolyte. The electrolytic liquid is fixed in the glue,and will not reveal. Solid gel electrolyte,there is not inside that short out,the hot capacity is large,heat exhaustion ability is strong,there is no phenomenon out of control of heat apt to produce of general battery(absorbing type).Solid gel eletrolyte even in density,stored in the sour strata phenomenon. Our clapboards are colloid battery clapboards which Europe AMER-SIL company PVC-SiO2 specially used, its aperture rate is high, and its resistance is low, circular capability of battery is perfect. Concentration of electrolyte is very low, so it has faint erosive effectsl on plates, life of battery is long then. Plates adopt to lead-calcium multiple alloy, local action of battery is very low, so it is needless to charge within two years. Anti-deep-discharging capacity of battery is strong, it can still be continually connect with load even though after 100% discharge., and it could resume original capacity if charging within four weeks. Safety valve of high-delicacy and low-press is adopted, and it makes battery using on the safe side. Using multi-acid O-ring rubber seal of high pressure to ensure that the life of the latter part of a column of the sealing performance.