What type of batteries does the KIT0210 power bank need? and how to connect output to usb

So your wiki does not actually say the type of batteries the KIT0210 power bank requires, but I found a retailer that sells it state it needs “three 18650 lithium batteries”. Are those button top or flat top batteries? and what voltage and milliamp hours for the batteries?

ok so the output from the power bank is 4 wires, what is the best connectors to put on the end of that for usb?