# Can USB-C charger from laptop be used to charge USB-C Samsung phone?

I have a Samsung S8 phone, which has USB-C charging connector. I lost the original charger for my phone, but I have the original USB-C charger for my Huawei Matebook X Pro laptop. Is it possible to use this charger to charge the phone? Is the USB-C standard itself a guarantee that all the relevant characteristics will be equivalent?

Here is the electric info from the mobile phone charger (which has USB-A female output connector, and there was USB-A to USB-C cable which I lost):

``````OUTPUT: 5.0V = 2.0A, 10.0W
9.0V = 1.67A, 15.0W

``````

Here is the electric info from the laptop charger (which has USB-C female output connector):

``````OUTPUT: 5.0V = 2.0A, 10.0W
9.0V = **2.0A**, **18.0W**
12.0V = 2.0A, 24.0W
15.0V = 3.0A, 45.0W
20.0V = 3.25A, 65.0W
``````

(There is a difference in ampere and wattage for the 9.0V, is that a problem or is it that the device will just take what it needs?)

• Is the wattage really 18.0W? Wattage is Voltage x Ampere, so having the same V and A shouldn't produce a different W. Oct 10, 2022 at 12:31
• @AndrewT. sorry, there is a difference in amperes too! I have edited the post. Thank you very much! Oct 10, 2022 at 12:39

## 1 Answer

According to Wikipedia Samsung S8 uses Qualcomm Quick Charge 2.0 for the higher voltage levels. When using a standard USB-C charger with the S8 the maximum is 5V * 2.5A = 12.5 Watt.

Most likely the laptop USB-C charger only supports USB Power Delivery and thus it will charge at maximum with 12.5 Watt.

• ... so, the conclusion is? :-) Oct 11, 2022 at 11:59
• @Tomas The conclusion is what I wrote in the last sentence. Expect to get 12.5 Watt @ 5V. Oct 11, 2022 at 12:27
• so, what is the answer to my question? Oct 12, 2022 at 13:33
• @Thomas I am sorry but the answer is clear and I have already written it: your phone does not support USB power delivery with more than 5Volt so it will not load with 9V because it only supports proprietary Qualcomm Quick Charge 2.0. Oct 12, 2022 at 15:01