Light-Dimmer Function - This lantern has a large knob in the front. You can adjust the brightness by rotating this knob until it reaches the desired level. It can help you save energy and make it work longer.DC Socket For Solar Charge - With the extended battery, you do not have to be worried about running out of light any sooner. For further reassurance, It has a DC socket and can be solar charged.1600mAh, 4 Volts Sealed Lead-Acid Battery - This rechargeable electric lantern has a 1600mAh battery that can provide continuous light for 20 hours. It can easily take care of all the light for one day.15 Hours Long-Time Battery - This rechargeable electric lantern has a large capacity battery that can provide continuous and constant bright light for 15 hours. It will be your friend in darkness and can easily take care of all the light for a long time.6 - 8 Hours Charging Time - After being discharged, the battery requires 6 to 8 hours to recharge completely. After charging, it is ready to be used again. For improved and more extended battery performance it is suggested that you charge the device regularly and avoid complete discharging as much as possible because that can decrease the battery lifespan and affect performance.PrecautionsUse a cotton swab with a little cleaning alcohol to clean the lamp body.Never use strong or volatile chemicals to clean the lamp. Otherwise, the plastic parts will be damaged.To avoid damage of lamp, please do not use other specified battery.To avoid electrical shock, please do not open the unit unless qualified person.To avoid danger, please do not change other specified electrical wire unless qualified person.