Ruth's sister 8-in-1 laptop DC power adapter conversion head kit internal power cable

Eight-in-one laptop power adapter kit

The Ruth's sister kit supplies eight interchangeable DC conversion heads that adapt a single 5.5 mm x 2.5 mm or 5.5 mm x 2.1 mm power source to multiple laptop input sizes. Each tip is labelled A through H and covers barrel dimensions of 3.5 x 1.35 mm, 4.0 x 1.7 mm, 4.8 x 1.7 mm, 5.5 x 1.7 mm, 5.5 x 2.5 mm, 5.5 x 2.1 mm, 6.3 x 3.0 mm and 6.4 x 4.4 mm with a 6.0 x 4.4 mm needle variant.

Travelers and technicians carrying mixed laptop

The set suits users who need one compact kit to power various notebooks from a common charger or car adapter. Buyers whose devices use proprietary connectors, USB-C power delivery or barrel sizes outside the listed range should look at dedicated adapters instead.

Barrel connector diameter range

The widest tip in the kit measures 6.4 mm outer diameter by 4.4 mm inner diameter, while the narrowest is 3.5 mm by 1.35 mm. Matching your laptop's exact jack dimensions to one of the eight supplied heads determines whether this kit will work.