... , military, industrial and mining enterprises This product can be used for the fire, electricity, public security, railways, oil, petrochemical, military, ... ), four gear (close).2, after use several times, charging time for 8-10 hours, then according to the normal charging time replenish ... 30 days. If long time no use, should be charged for 8 hours.3, if the battery is running out, prompting circuit ...