Highlights of the Product 1. Built-in high capacity (500*2mAh) rechargeable lead-acid battery 2. Long-life battery capable of sustaining over 300 cycles of charges and discharges 3. Manufactured with15 super-bright, long-life LEDs 4. Three-grade button switch. The forward grade for strong-light, the middle grade for week-light, the back grade for turning off 5. Run time on full power is more than4 hours. Instructions To charge the battery, pull the plug out of the bottom of the flashlight and insert the plug in the wall socket with 220V AC power source. The indicator will light up when charging startsIt needs about 15 hours to fully charge the battery. After charging, push the plug back to the flashlight. Maximum charging time should not exceed 18 hours.Cautions Charge it in time. Don’t let the battery exhausted for a long timeDo not use the flashlight when chargingCharge the battery before using the flashlight for the first timeCharge the battery before it is completely used up; otherwise, it would affect the battery lifeRecharge time: no more than 12 hourWorking time: about 4 hoursWarranty Power source is guaranteed for 3 months from the date of purchase if any real quality problems occur with this product, but damages caused by incorrect operation are not included