Without an external power source, the direct use of solar panels of the electricity, battery inside. I bought on Taobao, have a Taobao id, 52 century sun, his home made solar lights is that I found the most professional. I hope you're happy shopping! Solar garden electricity under normal circumstances, unless your electricity consumption mains complementary solar garden lights, specific advice 0312-8459500, Baoding Guangya Optoelectronics Technology Co., Ltd. technical staff can. Solar garden light takes solar energy, mainly by charging during the day, evening use, without the need for complex and expensive pipeline laying freely adjust the layout of the lighting, safety and energy saving non-polluting, charge and open / off process using intelligent control, automatic light control switch without manual operation, stable and reliable, save electricity, and maintenance-free. The system consists of solar panels, brackets, light poles, lamp, special light bulbs, batteries, battery box, and cage. The lamp shape colorful, chic and elegant, you can dress up and lighting for gardens, parks, playgrounds and other places. The product sufficient time electrically continuous illumination about 4-5 days to work 6-10 hours a day, can also be designed in accordance with the special requirements of the user. Solar garden parameter No. Product Name Model Quantity 1 2 to 3.5 m light pole, galvanized, plastic (color and shape can be customized) 12 solar panels 20w to 50W high efficiency monocrystalline solar panels 1 3 LED lamps 12V / 5 to 12V12W small particles of high brightness LED wick. 4 lead-acid battery 12V 24AH 55AH (solar-specific) 15 Battery buried box ABS material, with plastic pipe 16 solar controller anti-reverse, short circuit protection, digital display, one-button operation.