Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to make a portable and rechargeable usb charger [title] Clear all the mints and paper out of the altoids tin (mints can be put in a plastic bag so they can still be eaten. [step] ) [title] Find a female usb port. [step] These ports can frequently be found on usb extension cords.

Ending1: They are usually used to make the most out of your disk, so be wary if you want to connect the usb ports to two different devices and if one is already in a socket on your computer. [title] Search your computer for a usb port. Ending2: [title] If using a usb extension cord, cut the wire as far away from the part in which you plug in the wire you wish to extend. [step] Strip the wires find the black (-) and red (+) wires. Ending3: [title] Connect a small power supply to the front of the usb port. [step] Make sure the port is large enough to safely plug in a cable of some sort for a usb drive. Ending4: [title] Mark on the port an uat (bad battery life). [step] You can just leave the nipple on the disk.

Answer format: ending1/ending2/ending3/ending4