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Message: [QUOTE="Bombastus, post: 91469, member: 2178"] Apple supports USB-C fast charging on 16-inch MacBook Pro models from November 2023 onward when paired with suitable charging equipment. A monitor’s 140W specification alone doesn’t establish whether your particular setup qualifies. You can have enough power for everyday work without getting the fastest battery refill. You can also own a cable rated for 240W that won’t carry your monitor’s picture. Charging speed and a working display connection need separate checks. [HEADING=2]Your MacBook’s release date changes the answer[/HEADING] Open About This Mac from the Apple menu and check the model name, not just the screen size, before shopping for cables. For a 16-inch machine, “2023” isn’t precise enough. Apple released different 16-inch generations that year, and its USB-C fast-charge instructions draw the line at November. Not the early 2023 models. The specified combination pairs a 140W power adapter with a 240W USB-C charging cable. For the 2021 and early 2023 versions, Apple lists its 140W adapter and MagSafe 3 cable for fast charging. Those computers can still charge through USB-C from a compatible monitor, but successful charging doesn’t mean they’re fast-charging. Suppose your older MacBook already stays charged through its monitor while you work. Spending more on a 140W screen solely for faster refills through the same USB-C connection would be a poor bet. Keeping the separate MagSafe charger gives you Apple’s documented fast-charge arrangement. A newer model clears the laptop requirement, not every requirement. The date refers to the model’s introduction, not when you bought it. You still need a compatible power source and cable, rather than assuming the Mac will receive everything the monitor advertises. [HEADING=2]A high-wattage cable can still leave the screen blank[/HEADING] Apple’s 240W USB-C Charge Cable transfers data at USB 2 speeds. Its charging rating doesn’t make it a Thunderbolt display cable. Apple’s USB-C charging cable doesn’t support video output. Replacing a working monitor cable with that charging cable can therefore solve the wrong problem. You’ve selected for power capacity while losing the display capability your desk setup needs. A Thunderbolt cable can impose a lower charging limit. Apple’s three-meter Thunderbolt 4 Pro cable supports display output and data transfers up to 40Gb/s, but its charging specification stops at 100W. Its Thunderbolt branding doesn’t turn it into a 140W cable. For [B]fast charging without sacrificing the display connection[/B], check both capabilities on the exact cable you intend to use. The power rating and supported connection standard should appear in the same specification, not on two different cables. Consider a newer 16-inch MacBook connected through an existing 100W Thunderbolt cable. The monitor can display your desktop while the cable’s rating remains below the advertised charging output. A perfectly stable picture doesn’t prove the power connection meets the higher specification. Use the monitor’s supplied cable for the first test, and check its power rating rather than assuming it matches the monitor. Keep the laptop and monitor unchanged when trying another cable, so you’re testing the cable rather than several changes at once. [HEADING=2]A second charger can invalidate your monitor test[/HEADING] The [B][URL='https://goldmidi.com/community/threads/lenovo-started-selling-thinkvision-p27ud-40-in-china.76846/']ThinkVision P27UD-40’s 140W docking connection[/URL][/B] comes with a documentation problem worth resolving before you depend on it. Lenovo lists USB Power Delivery 3.1 with output up to 140W on its upstream Thunderbolt port. However, the attached footnote describes 100W at 20V and 5A using Lenovo’s proprietary VDM technology. It also says maximum output requires compatible Lenovo VDM equipment. Those statements don’t establish what a particular MacBook will receive. Neither assuming 140W nor declaring a universal 100W Mac limit would resolve the discrepancy. A compatibility confirmation for your model, or a direct test with the intended cable, is more useful than interpreting the headline number. For that test, disconnect MagSafe and any other charging source from the Mac. Leave the monitor connected directly to the Mac’s USB-C port, without an intervening dock. Otherwise, you may be checking a setup where the separate charger is supplying the power. You can check the detected power source in macOS. Hold Option while opening the Apple menu, choose System Information, then select Power and find the wattage under AC Charger Information. The reading describes the connected power source, not the battery’s actual charging rate. Apple’s fast-charge testing starts with drained batteries, and actual charging time varies with settings and environmental conditions. You can reconnect MagSafe while keeping the monitor attached for video and peripherals. The Mac uses only one charging source at a time, selecting the one providing the most power. Connecting both does not add their wattages together or make charging faster. [/QUOTE]

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