Charging over non-designated USB C?

On the Lenovo Yoga 730 there are two USB c ports on the side, with one designated for charging. However, if plugged in to the secondary port, the charge light still comes on and it charges. I'm wondering if this is a "feature" that could be useful or if is possibly damaging my device via an unexpected voltage coming through?

Guest

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YOGA 730-13IKB USER GUIDE
Page 10
[1] AC power adapter jack Connects to the AC power adapter.
Note:
For the Lenovo YOGA 730-13IKB, the AC power adapter jack is compatible with Type-C
(Thunderbolt output)

[3] Ty p e - C p o r t
The Type-C port is compatible with:
• Thunderbolt output
Note: For the Lenovo YOGA 730-13IKB, the Type-C port may be used as an AC power adapter jack

You can use either one for power charging and either one for Thunderbolt Output.

Guest

YOGA 730-13IKB USER GUIDE
Page 10
[1] AC power adapter jack Connects to the AC power adapter.
Note:
For the Lenovo YOGA 730-13IKB, the AC power adapter jack is compatible with Type-C
(Thunderbolt output)

[3] Ty p e - C p o r t
The Type-C port is compatible with:
• Thunderbolt output
Note: For the Lenovo YOGA 730-13IKB, the Type-C port may be used as an AC power adapter jack

You can use either one for power charging and either one for Thunderbolt Output.

Guest

No, all USB ports will charge, whether it's designated for charging or not. However, the one specifically designated for charging will work regardless of whether your computer is turned on or not. So you could turn your computer off, and keep a cellphone plugged into special charging port, and your phone will still get charged. If the computer is plugged into the wall outlet, then it will charge through that. If your computer not plugged into the wall, then it will charge via the laptop's battery.

YKhan

No, all USB ports will charge, whether it's designated for charging or not. However, the one specifically designated for charging will work regardless of whether your computer is turned on or not. So you could turn your computer off, and keep a cellphone plugged into special charging port, and your phone will still get charged. If the computer is plugged into the wall outlet, then it will charge through that. If your computer not plugged into the wall, then it will charge via the laptop's battery.

YKhan