Charge : Directly put the whole plug into the power(AC90-240V).The relative indication light turns on., charging starts. It takes about 12 hours.The first point is for 8 LED , the second point is for 22 LED, upwards is for OFF.After charging fully, it could be used continuously about 12 hours with 8 LED lamps and 5 hours with 22 LED lamps.When the led bulb is dark during usage, that means battery is at the stage of discharging. At this moment,in order to protect the battery, please stop using, and charge it in time.(Please charge before the led bulb is dark fully, otherwise it would damage the battery).Desk lamp should be usually used, please don"t shelve it for a long time. If you don"t usually use it,please charge it over 8 hours every 2 months, or it would affect the battery life.Caution:The power and socket must be according to safety standard.Please don"t use when charging, it would burn LED buld , or damage inner components.Please don"t shine the eyes directly, it would affect the eyesight.(Children must be instructed by adults)Keep away from rain or wet.Keep far away from the exploders when charging .The charging time could not be more than 24 hours (suggestion charging in daytime).