Two documented examples help explain cable ratings and laptop charging. They are separate examples, not a bundled recommendation.
Start with the laptop. Check its manual, the required cable type, and the negotiated charging power. If your current charger already meets the documented requirement, keep using it. These are manufacturer specifications, not hands-on tests. As an Amazon Associate I earn from qualifying purchases.
Plugable TBT4-40G2M is a 2m active Thunderbolt 4 cable rated up to 40Gbps and 100W.
Host and device capabilities still limit video, data, and power. It cannot add video capability to a data-only USB-C port. It is not a 140W or 240W EPR cable.
Plugable PS-EPR-140C1 is a single-port USB-C GaN adapter rated up to 140W with USB PD 3.1.
Its top rating requires a suitable host and compatible EPR or appropriate MagSafe cable. The laptop's negotiated input, not the charger label alone, sets actual charging power. Not every laptop accepts 140W.
The 100W cable and 140W charger records do not establish a 140W result when paired. They do not establish charging time, video support, or compatibility with every laptop, dock, monitor, or computer. A charger rating does not add video output.
Confirm the complete laptop and accessory documentation before buying.