Highlights of the Product 1. Built-in high capacity (900mAh) rechargeable lead-acid battery 2. Long-life battery capable of sustaining over 300 cycles of charges and discharges 3. Manufactured with7 super-bright, long-life LEDs 4. The forward grade for strong-light, the back grade for turning off 5. Run time on full power is more than6 hours. Instructions 1.To charge the battery, pull the plug out of the bottom of the flashlight and insert the plug in the wall socket with 110V or 220V AC power source. The indicator will light up when charging starts 2.It 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 1.Charge it in time. Dont let the battery exhausted for a long time 2. Do not use the flashlight when charging 3. Charge the battery before using the flashlight for the first time 4.Charge the battery before it is completely used up; otherwise, it would affect the battery life Warranty 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.