Voltaic K Connector 7.9×5.6×0.9mm – Female 5.5×2.1mm.
Use this K connector as an adapter to convert a 5.5mm barrel to a 7.9mm barrel
Male 7.9×5.6×0.9mm plug on one end and female 5.5×2.1mm plug on the other. Connector has a centre pin.
Connects to V72 Battery Output Wire or other 5.5 x 2.1mm connector cable.
Universal Lenovo: ThinkPad
This connector fits the 8mm input on all current Goal Zero battery packs (Sherpa & Yeti models)