... as follows:1st, the capacity reduces or lights a lamp the time to be insufficientReasonProcessing methodCharge insufficiencyFirst ... needs the long-term storage, every 6 months charge a time, charge to 50% charge condition. Seventh, ... miner's lamp to strictly prohibit going into a well the use.2nd, work and so ... lamp using in other uses, like smokes, fires a gun and so on.7th, strictly prohibits the miner ...