1. Maintenance free
2. Low self-discharge
3. Long life
4. Uniform voltage can be kept among battery
5. No failure with in two year storage
6. Quick starting touch-and-go
7. The battery can be freely used in three dimension directions
8. Value-regulated, the pressure built-up inside of cells can be release during occasional discharge
9. The battery can be fully recharged even after standing in a discharged stale of zero volt for one month
10. Safety: Without acid leaked, reliable opening and closing of safe-value prevent damage to equipment and explosion battery