Feature: 100 Brand New And High Quality Type:18650 Battery Pack Case Size:as picture show Can be packed into 6x18650 batteries 18650 Battery pack box:upgrading in traditional 18650 8.4V lithium battery group basis 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 Power supply:you can use 18650 rechargeable lithium battery as a power source The output side:USB and DC dual output power supply function,DC output voltage is 8.4Vcan power the 8.4V device,such as the bike light,DC output voltage is 5Vcan 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 Notice: Due to the different monitor and light effect,the actual color maybe a slight different from the picture color. Please allow 0.5-1cm differs due to manual measurement . Package List: 1 x 18650 Battery Pack Casebattery not included