>>2918379
>it does seem to work, but I haven't tried testing how long it will actually last
been doing this for years (but with LiPo batteries) and never had something bad happen so don't worry, they work and they last
just keep in mind that some laptops have 3 wires instead of 2 and some of them won't let you use the graphics card unless you provide a lot of power which common buck converters simply won't be able to provide on their own