Features:</br> Without 18650 battery,You need to prepare 6x 18650 batteries yourself to use.</br> DC 5.5x2.1mm interface has input and output functions.</br> DC 5.5x2.1mm port for 12V LED Light or other devices</br> The first use requires charging activation to use.</br> With a ON OFF switch,easy to use.</br> Turn on the switch to charge when charging.</br> Please use the same new 18650 battery, you can not use different capacity batteries or different brands of batteries.</br> Improve 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</br> Power supply:you can use 18650 rechargeable lithium battery as a power source</br> The output side:USB and DC dual output power supply function,DC output voltage is 12V(can power the 12V 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 protection,protection of the battery is more safe and sustainable</br> </br> Specification:</br> Material:Plastic</br> Color:Black,Blue,Red(optional)</br> Input Voltage:DC 12V or 12.6V</br> Output Voltage: DC Port 12V-12.6V</br> Overcharge protection voltage 12V</br> Standby current Under 80μA</br> USB Output Voltage:DC 5V</br> USB Output Current: 1000-2100mA</br> Size: 9x7x6.6cm</br> Cable length:55cm</br> 18650 Batteries are not Included</br> Note</br> Please put in battery in a right way.</br> Charge it when power indicator light flashes.</br> Don't use the device in the water. Waterproof standard is IPX4.</br> </br> </br> Packing list:</br> 1x Waterproof 6x 18650 battery box case.(without 18650 battery )</br>