“How do I know if I need 127 or 65 or 24 watt charger for Surface Pro 7? I charge my laptop while it is connected to a second screen (with its own power supply).”
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Microsoft recommends a 60 Watt charger for the SP7. The most power hungry processors that ship in the SP7 have TDP-up ratings of 25 and 28 watts. It is unlikely that those wattages would hold for over a minute, and the rest of the device hardware power consumption should remain comfortably under 20 Watts. Overall, a 60 or 65 watt Power Supply Unit (PSU) should be more than enough for your use case.
Sorry, there was a problem. Please try again later.I believe any of those will work. The only difference between them is how fast it will charge.
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