As a big battery manufacturers in China,Website:http://www.yangtze-power.com,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 AGM Battery 2v 500ah features : 1.Using oxygen recombination technology: maintenance-free2.PbCaSn alloy for plate grids: less gassing, less self-discharging3.High quality AGM separator: extend cycle life and prevent micro short circuit4.ABS material: increase the strength of battery container. (Flame-retardant ABS is optional);5.High purity raw material: ensure low self discharge rate6.Silver-coated copper terminals (T1, T2 terminal), brass insert terminals and lead terminals improve the  electric conductivity1. Functional Parameter 5. Environment Temperature Nominal Voltage 2VDischarge Temperature -20~50℃Nominal Capacity (10 hour rate)500AhCharge Temperature -10~50℃Number of Cells 1cellStorage Temperature -20~60℃2. Rated Capacity at 25℃ (77° F)6. Inner Resistance & Max . Discharge Current 10 hour rate (0.1C, 1.80V/cell)500AhFully Charged battery at 25℃ (77° F)0.42mΩ3 hour rate (0.25C, 1.75V/cell)369AhMax. Discharge Current 950A (5s)1 hour rate (0.55C, 1.60V/cell)254AhShort Circuit Current 3300A3. 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 243mmCyclic use2.35~2.4VWidth175mmMaximum charging current 125AHeight 332mmTemperature compensation -5mV/℃Total Height 341mmFloat use 2.23~2.27VReference Weight 30.1kgTemperature compensation -3.3mV/℃AGM Battery 2v 500ah Typical  Applications :1.Electric Power System (EPS)2.Emergency light3.Emergency backup power supply4.Auto control system5.Aircraft signal6.Alarm and security system7.Electronic apparatus and equipment 8.DC power supply9.Communication power supply