I love the ThinkPad T450s. It’s loaded with cheap RAM, the battery’s two-chamber battery system allows me to keep working all day, and the keyboard is incredibly amazing. But I have kept it on the shelf for a couple of years because I have switched from large chargers to an all-USB-C mobile lifestyle. That̵
See, most laptops made before around 2017 use a proprietary charger of one type or another, whether the old barrel ports that come in so many different flavors that you need a small rattling set of adapters if you lose it, or something completely unique, like my ThinkPad’s rectangular charger or the older MacBook magnetic cables. So trying to charge any of them from a standard USB-C charger would require some sort of Frankenstein mod of the laptop’s motherboard.
Not so anymore. Suppliers have started making charging cables with USB-C at one end and proprietary charging cable heads at the other. These are more than just standard cables – they have circuit boards inside that regulate the power and will not charge the laptop or charger. Because my original Lenovo T450 charging cable uses 45 watts (20 volts x 2.25 amps), I ordered this gallium nitride USB-C charger to match it, and I’m on the run. That’s about a third of the volume of my original charger, and I can also use it for all my other stuff.
A quick Amazon search found USB-C cables or adapters for Apple Magsafe and various barrel ports, so with a little digging you should be able to find options for many older laptop models. Just make sure you have a charger that can meet or turn off the power supply to the original charger.
ThinkPad Slim Tip-to-USB-C Cable Adapter