A long life. Very low self-discharge rate. 3 sufficient capacity. 4 wide temperature range. Good sealing performance. Good conductivity. 7 charge acceptance ability. 8 safe and reliable explosion-proof exhaust system. Applications. Versatile. Uninterruptible power supply. Electronic energy system. Emergency power supply 5. Emergency lights. Railway signaling aviation signal security systems, electronic devices and equipment 10. Intercom system power supply 11 DC power supply 12 automatic control system