Does the 100 W port hold up? Three measurements say no
The figure that sells this charger is the main 100 W USB-C port, meant to charge a laptop at full speed straight from the cigarette-lighter socket. Three independent measurements tell a noticeably more nuanced story. A dedicated German measurement times the drop: full power holds for only five minutes, then falls back to around 45 W. A measurement carried out with a laptop plugged in continuously confirms the same mechanism, at a different level: 93 W at the start, 65 W after four minutes, with no improvement even when the vehicle's air conditioning is aimed directly at the unit. A third measurement places the drop at an intermediate level, 75 to 80 W once the housing has warmed up.
The three end values differ, which is expected (unit-to-unit variance, ambient temperature, prior charging duration), but the mechanism itself, a sharp drop after a few minutes, is confirmed three times independently. One isolated data point, without a precise protocol or timing, points the other way toward power held for longer: too weak a signal on its own to outweigh three consistent measurements.
Three devices at once, without a hitch
Where the 100 W port disappoints over time, everyday multi-device use works as advertised: the two USB-C ports (100 and 30 W) and the USB-A port (22.5 W) charge three phones or tablets at once with no noticeable slowdown, including on trips with several passengers. The exact power split under simultaneous three-port use has not been confirmed by a reliable, independent measurement; absent that, the promise of smart sharing across the three ports gets the benefit of the doubt for this specific use, unlike the 100 W port on its own.
Heat that varies with the vehicle's socket
Contact-point heat at the cigarette-lighter socket runs uncomfortably high on some units, up to around 54 °C in one specific case, while the housing stays cool on other units even in strong external heat. This gap likely has less to do with a uniform charger fault than with the variable condition of cigarette-lighter sockets themselves, whose diameter and wear differ from one vehicle to another: an imperfect contact raises electrical resistance at the connection point, and therefore the heat given off there. A point worth watching at installation rather than a general alarm.
Reliability: the 100 W port, again, the most exposed
Beyond the power drop, a complete failure of the 100 W port after a period ranging from three months to under a year comes up more than once across the material available, while the rest of the charger keeps working. This failure pattern targets the component under the most thermal stress, consistent with the power-drop mechanism already covered: a port regularly pushed close to its limit, with frequent thermal throttling, is mechanically the most exposed to early wear. That is not the outcome for most buyers, but it is frequent enough to justify particular caution on this specific port, for example by avoiding continuous charges of more than a few minutes on power-hungry devices.
Build quality holds up, even under the harshest sources
A sign that the problem stays confined to the 100 W port rather than the product as a whole: perceived build quality remains good, a largely metal housing, well finished even according to the measurement most critical of the power it actually holds. One isolated case of front-panel cracking after a fall from a low height exists in the material available, but it stands as a single documented instance rather than a recurring pattern.
Against the rest of the Ugreen range: a deliberate mid-range choice
The 130W sits in the middle of Ugreen's cigarette-lighter charger range, between the two-port 63W with no included cable and the 145W with a built-in retractable cable. The detachable 100 W cable included remains its strongest argument against the 63W, and its price gap with the 145W comes down mainly to the missing built-in retractable cable, more convenient day to day but also more fragile over the long run on this type of accessory.
Who is this charger for?
The Ugreen 130W suits first and foremost anyone wanting to charge several phones or tablets at once without ever worrying about which port to use, with a 100 W cable already in the box. For anyone truly counting on charging a laptop at full speed over a long trip, the 100 W port's promise only holds up for the first few minutes: better to factor that limit into a battery-life calculation, or look at an alternative whose sustained power has been confirmed over time.
