Hi all. So I just installed accubattery to check my battery health, and noticed that the battery is charging at 3 amps, with dirty unicorns 8.1. However, with another ROM I used a while back it would charge at 4 amps. I was just wondering if anyone knows how to make it charge at the same speed on this new ROM
Voltage is dynamic so maybe the voltage is higher? The charging speed varies a lot depending on a few conditions
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in one of the threads i read that if you want to know weather your battery is working on full capacity or not you have to get 4.20 to 4.50 V when fully charged
i have been working on that for a couple of days with different builds
but all i got was a number between 4.150 to 4.18
now the big questions is this
how much you dear friend get when your beloved hd2 is fully charged and the snap dragon inside is angry enough?
just post your voltage that you get also any idea is welcomed
I've read 4.3 is what we're after but never get past 4.197, even after clearing battery stats, doesn't seem to be too much of a problem though!
4.2 is the most I ever got on my phone. I've never wiped the battery stats, too afraid now with magldr's charging problems.
From my understanding of lithium ion batteries, they last longer at less than full charge anyway.
You also need to take tolerance into concideration.
The Voltage sensor probably has a couple of % tolerance which can also be influenced by temperature, humidity etc
So I wouldn't worry, or even compare, if one is stuck at max 4.1 to 4.3 Volts.
Fluctuating Charging Voltage
Nice thread. Guys, I need your reply...
I'm designing a portable 4 Ni-MH powered USB charger for my Xperia X8. The peak summing voltage is 5,9V for zero load.
The question:
1. Is 5,9 V tolerable to be the input voltage?
2. What is definitely the 'legal' input voltage tolerance for the X8?
3. Does any recent handset always have built-in voltage regulator to make sure the battery is charged correctly?
Thanks for sharing...
I just noticed that Samsung is treating our batteries in a rude manner: they limit the charging voltage at 4.3v which drastically reduces battery life. I have searched all over the internet and I could not find a way to limit the maximum charging voltage. Is there any way to limit the charging voltage?
I measured the voltage with an intelligent charger, at first I got an overvoltage error as I tried to discharge the battery. I really don't feel comfortable driving around with a bomb in my car as Samsung did have issues with exploding batteries. The ideal voltage must be around 4.1v, maximum 4.2v
So you measured the voltage while it was charging in the phone? Not sure how you hooked up an intelligent charger to the battery while it's in the phone charging by the phone.
they limit the charging voltage at 4.3v which drastically reduces battery life.
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How does it reduce it?
And as far as I know, the charging voltage is 5.3V for the standard charger.
I was measuring the battery outside the phone after 1 day when I got out the battery out of the phone, fully charged.
Someguyfromhell, the USB voltage does not play a role here, the charging electronics is in the phone matters, USB provides, as you say, a fixed voltage.
Inx64, is there perhaps an ingeneering menu concerning the charging process where you can modify charging parameters?
I think you can measure voltage with this code *#0228#
Knowing the voltage from the menu is easy, controlling the charging voltage aparently not so easy, though.
Ive bought my n6p a few days back but is already a second hand.
Though its in perfect condition I would still love to take care of the battery since I know theres been a large chunks of battery cycle depleted already.
An average li-ion has about 300-500 charges before battery shows signs of deterioration.
In order to increase the battery life cycle, charging it with only 4.05 volts as conpsred to 4.20+ is the best way to take care of li-ion cells.
The problem is, the charger that comes with n6p produces volts from 4.16 as the minimum up to 4.4+ which is basicslly dtressful to the battery, plus letting it be plugged in to 100% increases temperature and so on.
I can go on.
Now, I have the habit and got an app that will chsrge the battery judt to 78% or 85% which turns down voltage just below 4.2, however there sre still instances that the voltage goes more than 4.2 even though im using a standard 900mah charger and not the rapid charger (original usb cable from huawei type a-std)
The question is, is there anyway to turn down voltage for n6p?
If not, any electrical engineer or anyone who has great knowledge backed with experience here to tell the comunity if chsrging in 4.2+ v is safe for n6p and why? Thanks
Charge voltage above 4,23ish is not good for lithium battery cells. Mine has a reported battery voltage of 4,4 volts.(!!)
As to the actual science of overcharging/over-volting lithium batteries, I don't think there's any long term 500-1000 charge cycle data. I do however have experience from radiocontrolled 1/8 scale lithium powered cars. Absolutely none of the lithium battery sellers or charger manufactors approve charging over 4,2volts. If you have a higher end charger you can push them to 4,25v-4,35v for cheaty improved off-the-line race starts but the charger will beep and complain/warn you constantly about the risks.
I was slightly concerned about charge voltage aswell, optimum charge modes for lithium cells are constant current ie 1800 mAh for this device until battery reaches 4,05 ish volts then constant voltage until 4,2v but it seems that phone manufacturers are either calibrating the measurement data or pushing the charge rate for convenience. If the latter is true you have all the right to call it planned obsolescence if the non-existent science of overvoltage charging is correct. The most accurate way to measure battery voltage would be to probe the battery directly while charging and while fully charged with a digital multimeter
I was looking for modules to enable quick charge for Mi A1, but all I found was the mistake Xiaomi made during Oreo beta. Is there any modules to enable quick charge for Mi A1, or someone to develop a module using magisk? I've installed Magisk Manager to install Gcam, that's what made me curious. Correct me if I'm wrong in any statement!
Quick charge is generally not a good idea because it lowers the lifespan of the li-ion battery. The stock 10W (2A) charger will charge the battery at 1.5C rate which is already above the recommended standard 1C.
If you are referring to the Qualcomm's Quick charge technology... No.... Except for the obvious kernel and android changes there are also several hardware changes that need to be done for it to be enabled. Also given that 625 is with QC3 you won't really notice that much of a decrease of charging time. We still have pretty good charging times and given that the battery is only 3K it is really not that much of a deal. In the end you'll have 10-15min faster charging. Also at the end of the charging cycle (around 90%) QC is lowered to an ordinary charging, so for small batteries like ours it doesn't really have that much of a use. Also given that our battery is not easily changeable, QC and all types of faster charging lowers the lifespan of the battery significantly and it can go down in less than two years. If it is subjected to regular higher temperatures(>40 degrees Celsius it will start to form copper inside of the battery and will increase its self discharge significantly) it will go down in an less than an year.
Some custom kernels - like moun kernel - have fast charge enabled.
Speed up is not rly high.
Roadwuzel said:
Some custom kernels - like moun kernel - have fast charge enabled.
Speed up is not rly high.
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Thanks, I'll look into it!
Quick Charge cannot be enabled( or shouldn't be ) on MI A1
Firstly let me clarify, I'm using RR ROM which has Moun Kernel by default, it has USB Fast Charge which is not to be confused with Qcom Quick Charge because it means it will Fast Charge( @10watts ) when on USB, that is plugged on a computer. On Stock ROM it charges very slowly when on USB.
Talking about Qcom Quick Charge, though sd 625 supports it, other hardware such as the battery isnt built to support higher voltages which can potentially damage the phone.
So no Quick Charge on MI A1
barrack1 said:
Quick charge is generally not a good idea because it lowers the lifespan of the li-ion battery. The stock 10W (2A) charger will charge the battery at 1.5C rate which is already above the recommended standard 1C.
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MiA1 has 3000mAh and supplied [email protected] charger gives 2A only! (I actually do get 2A charging up to 80% SoC).
Therefore, the MiA1 charging is at 2/3 = 0.67C and NOT 1.5C as you state.
For 0.67C, the time for 70% charging is 0.70/0.67 = 1.045hr = 63mins, which I'm getting in practice.
For 1.5C, 70% charging will be in 0.70/1.5 = 28mins!! Not just possible. Nobody, who tried fast charging using higher than 10W charger, has reported anywhere except slight decrease in charging time (for 70% charge).
The LiPo Battery in MiA1 is BN31. There may be a max charging current limitation circuit in BN31. I read somewhere (lost the reference, unable to find again) that 2.2A is the max limit.
In that case we get 0.73C and time for 70% charge will be 0.7/0.73 = 58mins. This HAS been reported using [email protected] at 3A. (BN31 allowing only 2.2A).
Add on Update:
There is one report on slightly faster charging of BN31. The max charging current is estimated to be 2.485A that is at 0.828C.
MiA1 got 0-100% charged in 92mins using One Plus' Dash Charger (not the charger provided which charges at 0.67). This is reported by TelecomTalk.
This is 24% faster than normal.
manabsac said:
MiA1 has 3000mAh and supplied [email protected] charger gives 2A only! (I actually do get 2A charging up to 80% SoC).
Therefore, the MiA1 charging is at 2/3 = 0.67C and NOT 1.5C as you state.
For 0.67C, the time for 70% charging is 0.70/0.67 = 1.045hr = 63mins, which I'm getting in practice.
For 1.5C, 70% charging will be in 0.70/1.5 = 28mins!! Not just possible. Nobody, who tried fast charging using higher than 10W charger, has reported anywhere except slight decrease in charging time (for 70% charge).
The LiPo Battery in MiA1 is BN31. There may be a max charging current limitation circuit in BN31. I read somewhere (lost the reference, unable to find again) that 2.2A is the max limit.
In that case we get 0.73C and time for 70% charge will be 0.7/0.73 = 58mins. This HAS been reported using [email protected] at 3A. (BN31 allowing only 2.2A).
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You're right that the stock charging rate is 0.67C which is a very moderate charging rate. No idea why the battery still heats up noticeably sometimes during charging. There was a change in the charging icon I think for the Oreo update which gave the erroneous impression that fast charging (>10W) was supported and people started (wrongly) reporting decreased charging times fueling the myth.
So the issue is I bought quick charge 3.0 adapter from xiaomi site but it isn't making much difference because stock thermal values are too limiting
It charges 2800 ma while temp is >37 c
2300-2400 at > 39c
After that at 1900
Is there any way to start throttling from 44-45 c
im shocked 2800mA charginig speed in RN7 as it is capable of 18W fast charging only
but well from my experience with different phones is that as the phone going to full charge especially after 85 % i experienced mobile heatup and the charging current drops, but i think your issue may arise during low charge mode as well
first of all charge your screen while keeping display off and after every 15 minutes you can check for the average charging current and temperature for that session via Accubattery easily
by the way which app are you using for charging current
app is not accurate for checking, use USB voltmeter direct to charger to check charging amps,
in a hot country with high temperatures >30C.....then quick charge will throttle faster as battery heats.
mi 2a charger (redmi note 7pro)
even regular 2a charger (with redmi n7pro) thermal throttle.
i put my phone in charging for an hour ago and i checked suddenly and it has charged only 20% (21% to 42%) and after changing charger the charging speed was back on and also the mi charger was hot would be aroung 30 to 35 celcius.