For this type of battery,it is unnecessary to inject and
do balance charge within three years of maintenance-free .undEr
Regularcondition.Its Service life is More Than 10 years for deep
charge-discharge cycle at wide operation temperature range(-40°C~+60°C),It
possesses the features of high reliability,resistant to vibration,shock,overcharge
and over-discharge,low duty cost.
It can be used as stand-by power of electric power system and D.C.
Operation power sources for railway (Coach,locomotive,metro),electric
power,communication,steel industry and petrol-chemistry.