BSD Series explosion-proof flashlight Features 1, source of imported high-brightness LED, energy efficient, A-type and effective illumination distance up to 250 meters, light, low light can be freely converted. 2, fully sealed design, waterproof up to one meter. Lithium battery with high capacity batteries, long life, low self-discharge. 3, non-slip handle casing depth, light and beautiful; except handheld portable way outside can also choose the tail long rope lanyard hand carry or shoulder. 4, charging, discharging, constant use of intelligent control chip, multiple protection, safe and efficient. Technical Parameters Parameter Name Parameter Value Unit BW7500A parameter value parameter value BW7500C BW7500B rated voltage power source V 3.7 3.7 3.7 W 5 3 1 rated capacity mAh strong flux lm≥ 290 ≥200 ≥120 effective range m 250 130 70 h light discharge time 3612 low light discharge time h 10 10 20 Charging time h8 ~ 10 8 ~ 10 8 ~ 10 lamp life h≥10 Wan ≥10 ≥10 Wan Wan battery life cycle ≈1000 ≈1000 ≈1000 Dimensions mmφ40 × 210 φ40 × 210 φ40 × 210 NW g300 300 300 Cautions △ Do not incinerate or disassemble the batteries, which are corrosive chemicals will damage the skin and eyes. △ Do not pull the battery leads or plugs to prevent damage to joints and joints. △ not mix different types of batteries. Welding, soldering, etc. required connecting piece on △ different types of batteries. △ before initial use with a small current is fully charged. △ not parallel charging, or will cause irregular charging current. △ can not reverse or make use of a battery short circuit. After △ battery is fully discharged, the charging time should be extended to reach the saturation power. △ Store the battery in a cool dry, the temperature is not higher than 45 ℃ in the environment. △ when the battery is fully charged or half full, not a large number of battery-intensive storage. Do not contact △ and acid gases, avoid near fire