... HO40, HR40, HS6, IS6, M905S, No.6, Number 6, R40. Description:Zn/Mn battery, R40battery, No.6 battery, high-power battery, environmental ... if the operating error, also no explosion leakage acid phenomenon2, Easy to use, no maintenance, especially suitable for free ... emergency power supply4, high quality and reasonable price5, No Voltage pulsation phenomenon(When students power easy to operate ...