Hi
I have problem with charging on my U11 with the stock charger and my anker charger with QC3. If i use the normal ports without QC3, I can get 5v and almost 2A.
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But on the voltage bumps up to 7.5v, the current drops drastically to 0.1-0.3a and it wont charge to 100% overnight. I am thinking my phone is having problem as it behave the same on 2 chargers. Any thoughts?
(The picture shows higher current because my phone is on and camera app is running. If phone is off, current is 0.1 to 0.3A)
If the battery is near full you won't get full power. It ramps down to prevent over charging. QC3 is dynamic charging and uses a negotiation routine.
Beamed in by telepathy.
shivadow said:
If the battery is near full you won't get full power. It ramps down to prevent over charging. QC3 is dynamic charging and uses a negotiation routine.
Beamed in by telepathy.
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While what you said is indeed true, that's not exactly the case the OP is experiencing. I say this because he won't charge to full even overnight. Sure, 99% to 100% takes slightly longer, but I believe it's definitely under 5 minutes.
OP, let me share my experience. I have one original HTC charger, one non-original HTC branded charger (half the price of an original, I don't care if it's a fake as long as the quality holds up), and a Xiaomi powerbank that supports two-way QC3.0 (meaning it quick-charges devices but can also be quick-charged itself).
1) The original charger and non-original both work perfectly, quick-charging my HTC U11.
If I charge this Xiaomi powerbank with a normal charger (5V/2A), it also quick-charges my HTC U11 almost as well as the wall chargers.
2) But, if I quick-charge the Xiaomi powerbank itself with a QC3.0 charger (18W), such as the two wall chargers mentioned above, then I have the same issue as you- namely that the powerbank becomes unbearably slow in charging the U11.
3) The way to fix this is to have the powerbank use up all its power then be recharged by a normal charger as in 1). Another way is use the powerbank to charge a normal device, one that doesn't use quick-charge. In both these cases the duration must be for over 2 hours, after which I suspect the "safety mechanism" of the Xiaomi will deactivate and make things normal. Obviously I'm not too happy with this powerbank so will be returning it shortly.
So OP you might wanna try something like charge your phone fully first with non-QC, and the same for your powerbank. Then try charging the phone again using said powerbank.
Related
I was browsing the web, and I found something interesting on Wikipedia:
Overcharge up to 5.2 Volts leads to the synthesis of cobalt(IV) oxide, as evidenced by x-ray diffraction
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So this basically means overvolting over 5.2V will make permanent damage to battery (if you look at the other reactions, the Cobalt Oxide can't be returned to original formula, so this will reduce battery LIFE)
Source
Normally phones have a built-in transformer.....
I believe they are talking about battery voltage. Lithium ion batteries are rated at around 3.7v but will have slightly over 4v when they are fully charged. Once your device charges to 100% it stops charging. You cannot overcharge a cell phone, laptop, etc. If you were to apply power directly to the battery contacts which is not recommended then you could overcharge. I belive what that is saying is if you went beyond the ~4v that a lithium battery is at when its charged to 100% and kept charging it up to 5.2v it would get damaged.
This is not talking about chargers which produce a nominal voltage of 5v. I've tested several USB chargers on a voltmeter and they read anywhere from 5.0 to 5.3 volts.
In this case, the USB charger is not so much a charger as a charging source.. the charging circuit is internal in the device and measures battery condition, temperature and voltage and will regulate down the 5V USB supply to the required charging voltage.
Attempting to increase the charging voltage source voltage from the generic USB levels to something higher will simply over-stress the onboard charging circuit to the point that it will fail due to excess dissipation.. and of course, there is no set of circumstances that says attempting to overcharge the battery directly at the terminals can possibly be a good thing
spunker88 said:
This is not talking about chargers which produce a nominal voltage of 5v. I've tested several USB chargers on a voltmeter and they read anywhere from 5.0 to 5.3 volts.
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I got my Qi pad yesterday in; this one specifically:
http://www.ebay.nl/itm/380712337929
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But the phone gets extremely hot after a short time. When charging by wire it's a little higher than the environment temperature: 22-25C = 71-77F (depends on trickle charge or duration charge of course), but when charging it over the Qi Pad the battery goes up to 42C=107F (and it went hotter the night before, but didn't check the temps back then).
I also notice it really jumps in terms of magnetic field. Now it's a minute I receive about 60 microTeslas of magnetic field, then it's a minute with 200 microTeslas.
Is this a normal for Qi charging? or is there something wrong and rather shouldn't use the pad?
how do you detect how strong your magnetic field is?
convolution said:
how do you detect how strong your magnetic field is?
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https://play.google.com/store/apps/details?id=com.eclipsim.gpsstatus2
Great toolbox honestly, tried a few, foumd this one to be so good I bought the pro version to support the dev. Temps might be a pro-only feature though, not sure.
And lol you already knew the app as you put it in your copied GPS fix guide.
The temperature range you provided is typical of induction charging. My N4 tends to be in the 100-110F range while charging wirelessly. Some heat is generated/energy is lost when transferring energy via induction.
The phone will communicate with the charger to draw the right amount of current depending on the battery state.
wx27 said:
The temperature range you provided is typical of induction charging. My N4 tends to be in the 100-110F range while charging wirelessly. Some heat is generated/energy is lost when transferring energy via induction.
The phone will communicate with the charger to draw the right amount of current depending on the battery state.
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Alright, then I know there is nothing wrong with the pad. It's a cheap chinese one after all.
even with the nexus charging orb, my nexus4 gets hot when using it. i think it's normal for the head to dissipate across the phone and the charger
That's a weird looking foot.
Sent from my Nexus 4 using Tapatalk
i use my gf's samsung qi charger and its the same. i dont know the exact temperature but i usually have to let it sit off charger for a a few seconds before picking it up as the back is extremely hot to touch.
alright, then I know it's normal, but I doubt it's healthy for the battery lifespan :/. Batteries usually degrade a lot when exposed to heat.
Has anyone tried using a non-OEM battery with a Quick Charge 2.0 charger? I've had a TrendON battery as a spare for a while but just decided to swap it with the OEM Samsung battery. After it dropped to roughly 60% I put the phone on an Anker QC 2.0 charger and watched the realtime power with a Portapow Premium DC Multimeter. It was initially drawing 15 watts (9V * 1.67A) and the charging light was green on the charger, indicating fast charging.
After a few minutes I took another look and while the voltage was still at 9V, the current was near zero. The phone was taking in milliwatts of power. I actually let it sit for a few more minutes and then restarted the phone thinking something was off. After restarting I let it sit a few more minutes and then confirmed that the battery percentage wasn't rising. It was stuck around 77%.
I took it off the fast charger and then put it on a "standard" 2A Anker charger and then the battery percentage continued to climb regularly. Really odd.
Anyways I have a graph showing the entire behavior. The green line is battery percentage and the orange line is charge rate as a delta of battery % per hour.
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The fast charger has worked flawlessly in the past when I had the OEM battery installed. I'm guessing that if the phone was drawing 0 watts it had shut down the charging of the battery for one reason or another. Thoughts?
I have been using oem charger with my 2 anker batteries without any issues for almost over a month.
Hmm... just took a peak at my phone and it's actually stalled out at a reported 80% of battery capacity, and this is not on a QC 2.0 charger. This may be a battery issue as I believe battery percentages are calculated relative to battery voltage. I'll reach out to the manufacturer, TrendON, but not holding my breathe as it's been a few months since I purchased it.
To power up, you consume Red Bull. But your phone just needs its adaptive fast charger. Rate this thread to express how quickly the Xiaomi Mi 9 can charge. A higher rating indicates that it charges extremely fast.
Then, drop a comment if you have anything to add!
Really want to know what protocol of the optional 27W wired charger (MDY-10-EH)
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If uou want the info on the Mi 9 power supply. Seems QC4+ but only paid licencing for QC3
So are other 27W chargers (like this: https://www.amazon.de/AUKEY-Ladeger...?ie=UTF8&qid=1552148377&sr=8-1&keywords=PA-Y8) working aswell?
memocatcher said:
So are other 27W chargers (like this: https://www.amazon.de/AUKEY-Ladeger...?ie=UTF8&qid=1552148377&sr=8-1&keywords=PA-Y8) working aswell?
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If you don't already have one why bother buying it?
For that money you buy the 20W wireless charging pad + cable + original 27W Xiaomi charger set from Ali. - LINK
I charged yesterday, from 1% to 100 % within 61 minutes. Box charger (chineese). Phone was ON, screen was off, I checked the level of charge a couple of times, but I doubt that it would charge quicker without it. I am thinking of checking on a phone OFF, how much will be the difference.
Seems OnePlus Dash charging is a lil bit faster.
I've got a 27 watt Motorola charger which is £20 quid on Amazon. Much faster than the 1 included in the box. For the money the Xiaomi is virtually flawless.
memocatcher said:
So are other 27W chargers (like this: https://www.amazon.de/AUKEY-Ladeger...ie=UTF8&qid=1552148377&sr=8-1&keywords=PA-Y8) working aswell?
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It should
I've measured the charging with the supplied 18W charger, and (at least mine) charges with 20W total, which I find super. So, with the same 18W charger, MI9 charges about 10% faster than my MI 8.
It takes less than an hour for full charge (from 3%).
So, I think I do not need the (very expensive) 27W one.
Fast charge
after miui 12 and edl flash there is no fast charging available so tried to check the cable and adaptor.
Interesting! with a Samsung fast charger adaptor my phone didn't charge. . . and stopped working.
so I am confused is it a firmware bug or a faulty adaptor or e.g phone has malfunction or etc?
My phone takes around 90 minutes with the 18W charger, which is pretty good coming from a P9 Lite without fast charging capabilities at all!
With my S10+ and S9 before it, I had several multi-port USB chargers where one support QC 2.0 or better for fast charging. Other than the OEM charger, I haven't seen any other chargers explicitly support the 9V/2.77A USB-PD 3.0 PPS standard the Note 20 Ultra uses. I have seen some USB-PD 45W chargers that say in the footnites that they do not support the 25W standard so this makes me wary of others. Grateful for any experiences others have had.
Even I am looking for an answer to this. Anybody found anything?
There's a few on Amazon I've ordered, I will update when I try them out
I got a car charger that actually does pps. And also a battery tank as well. Both charge the phone at 25watts (super fast charging).
You guys only looking for wall chargers?
I'm interested more in a power bank if possible
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Diaconescu_Tiberiu said:
I'm interested more in a power bank if possible
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Power bank I have and have tested out fully
https://smile.amazon.com/dp/B08B3GLY4Y/ref=cm_sw_r_cp_apa_fab_jM.BFb24JTYWR
Charges everything I have at full speed but notably the Samsung super fast charging.
dottat said:
Power bank I have and have tested out fully
https://smile.amazon.com/dp/B08B3GLY4Y/ref=cm_sw_r_cp_apa_fab_jM.BFb24JTYWR
Charges everything I have at full speed but notably the Samsung super fast charging.
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That looks like a beast of a battery bank. Such days. 100 watt out of battery bank. Amazing .
i carry a backpack with my laptop and other items (my man purse) and i just keep the 25watt brick and have this. fits in the front pouch of my man purse (backpack) and i get AC power to boot.
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or samms 25W 1000mah brick. i use this one too. two usb c ports plus fast wireless charging up top. you can charge more than one thing at a time. both of these items are small footprints.
marctronixx said:
i carry a backpack with my laptop and other items (my man purse) and i just keep the 25watt brick and have this. fits in the front pouch of my man purse (backpack) and i get AC power to boot.
or samms 25W 1000mah brick. i use this one too. two usb c ports plus fast wireless charging up top. you can charge more than one thing at a time. both of these items are small footprints.
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Just looked up. Omni goes for 200 bucks. Thats a lot of money for a portable battery bank. But amazing features. ?