The USV.bloc batteries are vented stationary batteries with liquid electrolyte (diluted sulphuric acid). HOPPECKE USV bloc battery is based on flat plate design. The special feature of the HOPPECKE USV bloc product is the around protection of the negative flat plates by pocket separator. Obtained by the around protection no short circuits are possible any longer by shedded active mass. Therefore USV bloc batteries are developed for high current applications, but they are even very good in cycling operations. They offer an excellent live expectancy and a maximum safety on operation. Caused on the higher acid density – comparing to the OGi bloc – the USV bloc offer a higher energy density. Therefore HOPPECKE USV bloc batteries are most applicable for USV applications. The shock resistant and highly translucent polypropylene container is resistant against all established cleaners and makes a comfortable electrolyte level check possible. HOPPECKE batteries of the USV bloc type series have a live expectancy from up to 12 years. It is recommended to use HOPPECKE USV bloc batteries with HOPPECKE AquaGen® recombination system to reduce the number of water refill procedures to a minimum and following this even to reduce the maintenance costs. In case of using HOPPECKE USV bloc batteries with AquaGen® recombination plugs water refilling is drastically reduced, and following this, even a total abdication from maintenance is possible.