: The string lights can work normally with one battery. The with one battery or one battery pack in random . 1. IP65, complete for outdoor and indoor use. . . Battery, reversible 18650 battery and USB charging cable included. . . reversible 18650, 3.7 V * 4000MA nonconvergent battery. After air-filled charge can be achromatic 10 -LRB- 60 hours -RRB-. . . Timer : 6 hours on, 18 hours off, cycle day-to-day. For example, you turn the lights on at 18:00, it will achromatic up until 24:00, The adjacent day, it will Automatically up at 18:00 and turn off at 24:00 without any manually handling, cycle like this mundane. Specification Color : Colored Bulb Color : Transparency LED Quantity : 30 LED reversible Ni-MH Battery : 3.7 v 4000mA Switch : One Button for MODE and Power. employed : 7 kinds of Flash/Steady on Charging Time : 9 hours achromatic Length : 19.7 ft -LRB- 6m -RRB-, 5ft leadership cable included Length between 2 bulbs : 0.5 ft -LRB- 0.15 m -RRB- Length from Battery BOx to basic stake : 5ft -LRB- 1.5 m -RRB- Package included 1 * easyDecor 30 LED battery string lights with battery box 1 * battery pack 1 * USB recharging cable 1 * User Instruction .