["Description:\n\nFeatures:\nbrand new and high quality.\nWithout 18650 battery,You need to prepare 4x 18650 or 26650 batteries yourself to use.\nfor DC 5.5x2.1mm interface has input and output functions,with for DC adapter,easy to use.\nfor DC 5.5x2.1mm port for 16.8V devices\nUSB 5V Port for Charging for Smart phone GPS Tablet PC or 5V LED Light and more.\nImprove replacement battery pack inconvenient shortcomings,greatly facilitate the users of the battery pack DIY requirements,without spot welding battery,thereby greatly reducing the battery internal resistance,improve the battery discharge performance,so as to effectively improve battery life\nPower supply:you can use 18650 rechargeable lithium battery as a power source\nThe output side:USB and for DC dual output power supply function,for DC output voltage is 16.8V(can power the 16.8V device,such as the bike light),USB output voltage is 5V(can power the cellphone and other 5V device),to meet a wider usage scenarios,the product comes with overcharge and over discharge for protection,for protection of the battery is more safe and sustainable\n\nSpecification:\nMaterial:Plastic+metal\nColor:Black,Red\nInput Voltage:DC 16.8V\nOutput Voltage: for DC Port 16.8V\nStandby current Under 80μA\nUSB Output Voltage:DC 5V\nUSB Output Current: 2000mA\nSize:9x6.5x6.5cm\nCable length:29cm\n18650 Batteries are not Included\n\nNote\nPlease put in battery in a right way.\nCharge it when power indicator light flashes.\nDon'for t use the device in the water. Waterproof standard is IP67\n\nPacking list:\n1x Waterproof 4x 18650 /26650 battery box for case.(without battery )\n1x 5.5x2.1mm adapter\n4x 18650 to 26650 battery converter"]