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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

This is why batteries must be user-replaceable (en.EverybodyWiki.com).

[–] [deleted] • 0 pt

its hard to find one now, i use to carry a charged battery when i went out in the middle of nowhere. now they have battery packs etc.

but yeah, the thing is about is finding someone to sell you one. most phones can be taken apart with a little effort & heat.

I mean to say again, you want a slow charge. I mean your battery could charge in a 15 minutes, it will be hot as hell tho and will not last long. The charge life last shorter and shorter to make you think you need a new phone.

this is the same, well with any battery. your car battery etc., or even deep cycle batteries. you trickle charge them for longer life

[–] • 1 pt

Most people don’t know how batteries even work. Why they lose charge and what recharging a battery actually does. A ten minute YouTube video could explain all of this for these people, but they don’t care to learn. Just replace everything and constantly be working to spend more!

[–] [deleted] • 1 pt

well you are correct, its planned obsolesce. its a disgusting part of capitalist. it use to not be this way. fucking commies ruin everything

[–] • 0 pt (edited )

you want a slow charge

I cherish fast charging. I cherish watching the battery indicator shoot up since last time I looked. I cherish seeing the battery percentage having raised by another 7% after I return from toilet.

Mobile phones are also supposed to be mobile. Faster charging enables more mobility and less time chained to a wall/power bank.

Yes, for overnight charges, slow charges are acceptable due to abundant time. But there is also the problem that full charges wear down the battery.

All reasons why user-replaceable batteries should be mandatory.

taken apart with little effort and heat

From this point, manufacturers always descend into making it more and more difficult.

  • iPhone 4: Two screws at bottom.
  • iPhone 12: Terminals behind main board and batteries hardware-ID-locked.

This is how technological degeneracy works. Users should be paranoid about this. In an ideal world, whichever vendor engaged in deceptive practices like these, they would get a rightful mass-boycott.

Edit 1: Typo

[–] [deleted] • 1 pt

god dammit, i had something all written out and hit cancel. condensed version.

I'm all for right to repair, Louis Rossmann has countless of info about it.

They dont want you to repair, but rather buy new