Many of us have used soldering irons in the past for doing repair jobs around our home or office. You don’t always need your pro kit to take on small tasks. This USB Soldering Pen by Thanko lets you solder anytime. It gets hot in 15 seconds once you have connected it to a hot USB port. Once you are done, wait 30 seconds for the pen to cool down. This could prove useful if you need to solder on the go.