Use 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 oopen the unit unless qualified person. To avoid danger, please do not change other specified electrical wire unless qualified person. Battery 4V 900mAh lead-acid rechargeable free-maintenance battery LED: 5W LED Bulb Charging Time 10+ hr Brand other SKU SO445OT1JPQ0ONAFAMZ-141739