["Description:\r\n\r\nFeatures:\r\nbrand new and high quality.\r\nfor DC 5.5x2.1mm interface has input and output functions.\r\nfor DC 5.5x2.1mm port for 8.4V LED Light or other devices\r\nUSB 5V Port for Charging for Smart phone GPS Tablet PC or 5V LED Light and more.\r\n18650 Battery pack box:upgrading in traditional 18650 8.4V lithium battery group basis\r\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\r\nPower supply:you can use 18650 rechargeable lithium battery as a power source\r\nThe output side:USB and for DC dual output power supply function,for DC output voltage is 8.4V(can power the 8.4V 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\r\n\r\nSpecification:\r\nMaterial:Plastic+metal\r\nColor:Black,Blue,Red\r\nInput Voltage:DC 8.4V\r\nOutput Voltag: for DC Port 7.7V-8.4V\r\nOvercharge for protection voltage 8.4V\r\nOver discharge for protection voltage 5V\r\nDischarge for protection current 9A\r\nStandby current Under 10μA\r\nUSB Output Voltage:DC 5V+/-0.2\r\nUSB Output Current: 1000-2000mA\r\nSize:9x6.5x5cm\r\nCable length:57cm\r\nBelt length:53cm\r\n18650 Batteries are not Included\r\nNote\r\nPlease put in battery in a right way.\r\nCharge it when power indicator light flashes.\r\nDon'for t use the device in the water. Waterproof standard is IPX4.\r\n \r\n \r\n \r\nPacking list:\r\n1x Waterproof 6x 18650 battery box for case.(without 18650 battery )"]