Features: 
*Long operation life: Cycle life is more than 600 times in normal conditions; 
* Wide operation range: It can be operated in the environment of -18~50centigrade; 
*Small self discharge: Load holding capacity is batter than IEC standard; 
*Strong emergency adaptability: It can charge quickly in 1~6h in emergency conditions; 
*Good safety and reliability: Each battery has a safety valve, so it can have high safety and reliability during long-period operation process or in major failures.