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Caution:

If you lack basic understanding of electronics and its terminology (i.e. voltage; polarity), I discourage you from trying this.

It is not dangerous per se (I myself do this on a regular basis, and have never caused any damage), but still: Leave it alone if you have poor understanding of it.

Samsung phones with Qualcomm Quick Charge 2.0 released between 2014 (Note 4) and 2018 (S9, Note 9) significantly throttle down charging (from 15W down to 6W*1 total power throughput, i.e. to both battery and other components) while the device is being operated. This throttling is manually requested by the operating system, regarding that the throttling only kicks in around half a minute after the booting of the device is completed.

But I have observed that applying the elevated voltage of 9V manually (anything above 7V should work, but 9 Volts are recommended), which can be done through a two-port KW203 USB multimeter (port 1 (data lanes pass through): Quick Charge Tester for voltage request (pic8.co), port 2 (shorted data lanes): connect phone) significantly boosts charging while the screen is on. Said device (pic8.co) can be used to request the 9 volts from the Qualcomm Quick Charge-enabled USB charger.

Now, the power throughput while the screen is on doubles to around 10 to 12 Watts. About twice as high.

However, power throughput while the screen is off slows down from 15 to around 12 watts. But the power benefit during operation would often have outweighed it. The manually applied voltage is a hidden additional option.

I found this out in 2018 or 2019 (not sure if I have already shared it somewhere), but if only I knew this in 2016. This could have spared me headaches.

This hack might also work with other mobile phone models which support Qualcomm Quick Charge 2.0 and/or MediaTek Pump Express [do not try it with phones that support neither of these]. If anyone has tested it, feel free to share it in a comment.

Foot notes

  • *1: Exception: The Note 4 apparently throttles to around 8 to 9 W instead of 6 W, but more recent phones (S6, Note 5, S7, Note 7, S8, Note 8, S9, Note 9) throttle to 6 W.
##Caution: If you lack basic understanding of electronics and its terminology (i.e. voltage; polarity), I discourage you from trying this. It is not dangerous per se (I myself do this on a regular basis, and have never caused any damage), but still: Leave it alone if you have poor understanding of it. ----- Samsung phones with Qualcomm Quick Charge 2.0 released between 2014 (Note 4) and 2018 (S9, Note 9) significantly throttle down charging (from 15W down to **6**W^(^*1) **total** power throughput, i.e. to both battery and other components) while the device is being operated. This throttling is manually requested by the operating system, regarding that the throttling only kicks in around half a minute **after** the booting of the device is completed. But I have observed that applying the elevated voltage of 9V **manually** (anything above 7V should work, but 9 Volts are recommended), which can be done through a two-port *KW203* USB multimeter (port 1 (data lanes pass through): [Quick Charge Tester for voltage request](https://pic8.co/sh/K6GVtv.jpeg), port 2 (shorted data lanes): connect phone) significantly boosts charging while the screen is on. [Said device](https://pic8.co/sh/K6GVtv.jpeg) can be used to request the 9 volts from the Qualcomm Quick Charge-enabled USB charger. Now, the power throughput while the screen is on **doubles** to around 10 to 12 Watts. About **twice** as high. However, power throughput while the screen is **off** slows down from 15 to around 12 watts. But the power benefit during operation would often have outweighed it. The manually applied voltage is a hidden additional option. I found this out in 2018 or 2019 (not sure if I have already shared it somewhere), but if only I knew this in 2016. This could have spared me headaches. This hack might also work with other mobile phone models which support Qualcomm Quick Charge 2.0 and/or MediaTek Pump Express [do not try it with phones that support neither of these]. If anyone has tested it, feel free to share it in a comment. ---- ### Foot notes * \*1: Exception: The Note 4 apparently throttles to around 8 to 9 W instead of 6 W, but more recent phones (S6, Note 5, S7, Note 7, S8, Note 8, S9, Note 9) throttle to 6 W.

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[–] • 0 pt

We are talking about your post, which is talking about manually increasing the charging voltage...

[–] • -1 pt

Yes. The charging IC of the smartphone is able to handle manually applied voltages of 9 volts, because Qualcomm Quick Charge 2.0 operates on that voltage anyway.

[–] • 0 pt

The average user is too inept to properly understand any of this. You’re giving them accurate and correct advice that they could do a lot of damage with malpractice.

[–] • 0 pt (edited )

Ok, I will add added a warning on the top.