As a big battery manufacturers in China,Website: , we supply many different kinds of batteries,such as the lead acid AGM battery ,  Gel battery,AGM deep cycle battery,Gel deep cycle battery,OPzV battery,OPzS battery ..etc . The following is our Gel Battery 2v 500ah features : 1.Long time discharge2.Suitable for space and storage electric power use3.Special plate design, long cycle lifetime4.Using special lead-calcium alloy to boost up the grid anti-corrosive performance and extend the battery using lifetime5.Using special separator to boost up the battery performance inside6.High thermal capacity, reduce the risk of thermal out of control and drying hard, can be used in bad environment7.High gas recombined reaction efficiency8.Little water losing, no electrolyte stratification phenomenon9.Long storage time10.Good deep discharge resilience performance11.Using gas silicon dioxide, small granule degree, bigger than surface area1. Functional Parameter 5. Environment Temperature Nominal Voltage 2VDischarge Temperature -20~60℃Nominal Capacity (10 hour rate)500AhCharge Temperature 0~50℃Number of Cells 1cellStorage Temperature -20~60℃2. Rated Capacity at 25℃ (77° F)6. Inner Resistance & Max . Discharge Current 20 hour rate (26.5A)530AhFully Charged battery at 25℃ (77° F)0.31mΩ5 hour rate (88.4A)442AhMax. Discharge Current 1270A (5s)1 hour rate (275A)275AhShort Circuit Current 3800A3. Capacity affected by Temperature (10 hour rate)7. Self-discharge  at 25℃ (77° F)40℃   (104° F)102%Capacity after 3 month storage 92%25℃   (77° F)100%Capacity after 6 month storage84%0℃    (32° F)90%Capacity after 9 month storage74%-15℃   (5° F)70%Capacity after 12 month storage65%4. Dimension and Weight 8. Constant voltage charging at 25℃ (77° F)Length 241mmCyclic use2.33~2.37VWidth171mmMaximum charging current 75AHeight 349mmTemperature compensation -5mV/℃Total Height 368mmFloat use 2.23~2.27VReference Weight 31.2kgTemperature compensation -3.3mV/℃Gel Battery 2v 500ah  Typical  Applications :1.Golf trolleys2.Wheel chairs3.Solar and wind mill units4.Traffic lights5.Street signs6.Telephone systems7.Clocks systems8.Uninterrupted9.Elevators emergency power supply (skyscrapers)10.Solar applications11.Mobile stations12.Telecommunication backup