... mineral industry, tunnel projects, constructionand maintenance for power, miner lamp is suitable for mineral industry, tunnel projects, constructionand ... power, communication, highway, railway at night, night lamp for cutting offrubber plant and absorbing mucus and for ... Low cost, high safety,2.Maintenance free Li battery is used,3.Main light source used 7 ... LED,4.Handset charger is used. miner lamp cap