Miner's Lamp: 1. LED 2. Voltage: 3.7V 3. Battery: >500 ... Time: >20 hours Product Features:a. Model meaning: K - Miner lamp, L - Lithium battery, 5 - 5Ah---battery capacity, L - LED ... illuminant, M - Maintenance freeb. The green light in lamp head will auto-change to red when the charging is ... to recharge it. d. Lithium battery used in the lamp can be recharged for more than 800 times and is ...