Long and narrow design
Female thread terminal with tin-plated copper insert located at the front end makes installation and connection very convenient
The lid fabricated with centralized exhaust system so as to guide-out any gas and acid spray during the operation
Proprietary Pb-Sn alloy with addition of Ca for positive grid
Special high temperature and high humidity curing process, 4BS positive active mass
Optimized active mass design and elements assembled with high pressure
Proprietary terminal sealing structure without acid leakage
Patented complete valve with labyrinth design and double acid-proof discs
Narrow float voltage variation, uniform and stable recombination rate