... distance)Beginning≥2000≥2000≥2000After 11 hours≥1100≥1100≥1100 LED light sourceRated voltage (V)3.53.23.5Rated current( ... battery, security device and the battery slot, etc.)...The lamp is equipped with specially designed optical system,with primary and ... . Excellent toughness, Anti-static, waterproof, and explosion-proof, the miner's safety is highly improvedThe battery is lithium ion battery which ...