Why does ampere/aida64 show 3.4A charging current? - Redmi K20 Pro / Xiaomi Mi 9T Pro Questions & Answe

Why does it show 3.4A charging current when the charger can supply only 3A maximum?

Anyone?

Let me start by saying: I don't really know.
But I can speculate a bit about it...
Who knows how the app gets that number? I don't think the OS reports the charging current. The app can periodically measure how full the battery is. Either as reported by the OS or calculate it from battery voltage.
So you could say that if you gain 1000mAh in 1 hour, you charge at a rate of 1A. If you charge at 3410mA with a voltage across the battery of 4.316V, that's 14.7W. If your charger delivers 14.7W at 5V, that's just under 3A. So it all works out.
Another possibility is this: In order to calculate the gained charge from the voltage or from the reported percentage, you have to know the total maximum capacity of the battery. This device reports 4000mAh, but people say it may be less. If the battery is smaller than it says it is, then it would fill up faster than expected, so the app would calculate a higher current.
Again, I don't really know, but these are my two theories.

rounakr94 said:
Why does it show 3.4A charging current when the charger can supply only 3A maximum?
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I'd say they just rounded down. A car with a healthy battery might be 12.7v or even 13v when on, even though it's rated to be 12v.

Guys rented a usb current meter and it reads 9V 2A when the device shows 5V 3.5a. So essentially the phone is displaying the 9v as 5v so increasing the amperage

Related

Charging question for the EE's

Throughout a day I charge my Tilt from a variety of sources: the stock charger, my old Apache's charger, my PC, car charger, my Moto headset charger ...
Looking at them all the only difference I see listed is the amperage.
The Stock charger is 1Amp, so is the Apache's
The Moto charger is 550mA
iGo Charger is 1.5Amp
no idea what the PC or the car charger output is.
I am assuming that the differences in amperage would simply effect how quickly the battery charges to full. Is that correct?
Maybe also that a fully depleted battery would need a full 1Amp charger to begin charging ... the 550mAmp might not cut it for a fully depleted battery.
Would charging with a lower amp charger (550mA) or a higher amp charger (1.5A) have any long term negative impact on the charging or overall battery life?
Just curious ...
batteryuniversity.com
telll us wat u learn
The amp rating is the normal maximum current that can flow from the particular charger. They all are spec'd to put out a regulated 5V but the current comes into play if you are using the phone at the same time as charging. If the phone draws more than the charger can supply then it's going to take longer to charge or may not fully charge. Normal charger is 1A and with that the phone can be used most likely at the same time. With a 550ma charger I'd turn the phone off (standby) to ensure a full charge in a reasonable time.
None should affect battery life, just time to reach full. The charge lite on the phone is your guide, when it's amber, it's charging, green it's full, simple as that.
The only thing that will harm the lithium is to take the phone to dead for long periods, that's the hardest thing on a lithium.
Also see http://wiki.xda-developers.com/inde...y car or USB charger! It just doesn't charge!

HTC One voltage app?

I need an app where i can see what voltage its getting when charging. I think current widget is not working. Also i don't know why my battery did this. Lost 10% in an instant. (check screenshot) No wake locks. I've been using a belkin charger with 5v = 1a output and a generic micro usb.
carlosii said:
I need an app where i can see what voltage its getting when charging. I think current widget is not working. Also i don't know why my battery did this. Lost 10% in an instant. (check screenshot) No wake locks. I've been using a belkin charger with 5v = 1a output and a generic micro usb.
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You could try AndroSensor. It shows all the data from the phone's sensors, including battery temperature and voltage.
As for the 10% drop, did this happen right after you took the phone off charge? I've read a lot about the phone's "trickle charging", where the battery charges to 100%, charging stops. When the battery drops a little it begins charging again to 100% but it won't display this while plugged in.
Depending when you took the phone off charge, you might have caught it after the battery dropped and before it charged back up to 100%.
Hope this helps!

How fast does your note 4 charge?

I recently ran an app called Ampere and it says my battery is charging at 3.962 volts at 1030 M.A. Shouldn't it charge around 2000 M.A.? Was wondering if the app is accurate or what are some of your charge rates
Using the Oem charger and cable
My phone charges (while off) from completely dead to fully charged in about an hour and 15 minutes.
Something is wrong with your cable/charger. The official fast charger will quickly charge to about 85% then trickle charge afterwards to 100%
ihateu said:
I recently ran an app called Ampere and it says my battery is charging at 3.962 volts at 1030 M.A. Shouldn't it charge around 2000 M.A.? Was wondering if the app is accurate or what are some of your charge rates
Using the Oem charger and cable
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Click to collapse
The maximum amperage is determined by which charger you are using, what charging mode you are in, and how full the battery is.
If you are using the Note 4 OEM charger with fast charge capability, take a close look at it. You'll find that in fast charge mode, the maximum amperage is 1.67 A, not 2 A. So, 2 A isn't even possible in a properly functioning OEM charger in fast charge mode.
You will also see that, with fast charge mode turned off, the maximum amperage is 2.0.
Confused? Many are, because we have become used to the notion that, in order to increase charging speed, the amperage needs to be increased. And that is true, so long as the voltage remains the same.
But, when you look closely at the OEM charger, you'll notice that in fast mode, the voltage is 9 V. In regular charge mode, it is 5 V. So, the charger achieves faster charging by increasing voltage, not amperage. Why does this work?
Math.
Power (in watts) = Amperage x Voltage.
In regular charge mode, 5V x 2A = 10 watts of power to the battery. Not bad.
But, in fast charge mode, it's 9V x 1.67A = 15.03 watts, a 50% increase in power to the battery.
Why your battery is pulling 1.03A @ 3.962V is not really clear without more information. As mentioned previously, there are various reasons for your scenario, but in no case can you achieve 2A input to the phone when in fast charge mode.
Try discharging your battery to, say, 20%. Then, look at your numbers again. You'll discover that, as the battery's charge increases, the amperage will decrease. 4V and a little over 1A is what I get when my battery is about 75% full, and it decreases rapidly from there.

Nokia 8 Charge Speed ?

I've tried three chargers now and I'm only getting 1500mah charge speed at 60% battery
Original Nokia Charger 2.5ah Charge Rate
Aukey Quick Charger 2.4ah Charge Rate
Generic 2ah charger
Anyone else getting slow charge speeds?
You getting low current because Nokia 8 supports QC3.0.
Quick charge uses higher voltage than standard charing.
Current stays low, but voltage goes up so total wattage is higher.
1.5A x 5V = 7.5W
1.5A x 9V = 13.5W (same current, but double power)
TeddyBeers said:
You getting low current because Nokia 8 supports QC3.0.
Quick charge uses higher voltage than standard charing.
Current stays low, but voltage goes up so total wattage is higher.
1.5A x 5V = 7.5W
1.5A x 9V = 13.5W (same current, but double power)
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But voltage doesn't increase charge speed, 1.5a would charge the phone in 2 hours whether it's at 5v or even 12v, my aueky charger can push 2a at 12v but it seems like this phone just doesn't like higher amperage.
As with all quick charge solutions the flatter my battery is the faster the charge rate, the fuller the battery gets the slower the charge rate gets.
ryanraven said:
But voltage doesn't increase charge speed, 1.5a would charge the phone in 2 hours whether it's at 5v or even 12v, my aueky charger can push 2a at 12v but it seems like this phone just doesn't like higher amperage.
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You're completely wrong.
Battery is 3090mAh at 3.7V
This is total 11.4Wh - this is tells you much more about battery, as knowing current without voltage means nothing.
(for example power tools batters are 4000mAh only, but at 18V gives huge 72Wh of power to use, 7 times more than phone battery)
back to Nokia:
11.4Wh / 1.5A / 5V = 1.5 hour
11.4Wh / 1.5A / 12V = 0.6 hour
As you can se voltage matters as it shortens time needed to charge by almost 3x.
Obviusly in real life battery will not charge that fast as there is a lot of loss on heat, voltage conversion etc.
TeddyBeers said:
You're completely wrong.
Battery is 3090mAh at 3.7V
This is total 11.4Wh - this is tells you much more about battery, as knowing current without voltage means nothing.
(for example power tools batters are 4000mAh only, but at 18V gives huge 72Wh of power to use, 7 times more than phone battery)
back to Nokia:
11.4Wh / 1.5A / 5V = 1.5 hour
11.4Wh / 1.5A / 12V = 0.6 hour
As you can se voltage matters as it shortens time needed to charge by almost 3x.
Obviusly in real life battery will not charge that fast as there is a lot of loss on heat, voltage conversion etc.
Click to expand...
Click to collapse
It definitely charges slower than any phone I've had ? my G5SPlus has a bigger battery and charges in half the time ? but like I said at any voltage it only pulls 1.5a from the plug so the 3090mah / 1500mah(ChargeRate) at any voltage from my 5v charger or my quick charger at 12v charges exactly the same 1.5ah which takes about 2 hours. In this case voltage doesn't make any difference in charge speed at least with my Nokia 8 device it never goes past charging faster than 1.5ah no matter what voltage the charger is.
Listen to TeddyBeers, as you are mistaken in thinking voltage doesn't matter.
At 5V and 1.5A, you have 7.5 watts of power to charge with. Assuming perfect efficiency, that means you are getting about 7.5/3.7 = 2A of charging current into the battery (at least, when the battery is sitting at around 3.7V).
At 12V at 1.5A, you have 18W of charging power. That means 18/3.7 = 4.9A at the battery.
The current through the USB cable does not matter, only the power! The voltage is converted inside the phone so that the battery charging current will NOT be the same as the USB current.

Fast Charging or Slow Charging?

Is there any way to tell whether the Xperia 1ii is currently fast charging or slow charging?
Sometimes when I plug my USB-C cable into my Samsung devices, it'll says "Fast Charging" or "Charging". If it just says "Charging", i remove the plug and plug it back in and it often says "Fast Charging" (not sure if there's dust or a loose contact between the port and cable", but nevertheless, it indicates that the device is drawing a higher current and is fast charging).
Thanks
I using super fast charger from samsung S20 into sony,but i never seeing " Fast charging" notif in sony
No it doesn't differentiate.
But it uses usb PD to fast charge not quick charger.
So I have Xperia 1 and when I connect a fast charger to it and it shows "charging" that means its fast charging and there is no way to tell? Because my S10 says it right on lockscreen, My oneplus 7 did with doublebolt on battery for dash charging even my xiaomi mi8 did say charging rapidly on lockscreen
Actually, Sony Xperia devices use the Qnovo adaptative charging to charge as fast as possible BUT not too fast in order to preserve the battery health. This is why the charge can be slower than other brands which don't care about the battery lifetime...
You can tell by how much charge % is indicated per minute what mode it's in.
On a 10+ it's double the rate of snail mode in roughly the 30-80% range.
On the 10+ fast charge will not engage if the battery temp is somewhere below 60F (not sure of the exact temp). Other makes are probably similar.
Fast charging does no harm; high cell voltage (80+%) and high temperature are what degrades them.
Low temperature charging can permanently degrade them.
Battery should be above 72F before charging to prevent Li plating in the cell.
Never charge a cell if it's near or below 32F.
blackhawk said:
You can tell by how much charge % is indicated per minute what mode it's in.
On a 10+ it's double the rate of snail mode in roughly the 30-80% range.
On the 10+ fast charge will not engage if the battery temp is somewhere below 60F (not sure of the exact temp). Other makes are probably similar.
Fast charging does no harm; high cell voltage (80+%) and high temperature are what degrades them.
Low temperature charging can permanently degrade them.
Battery should be above 72F before charging to prevent Li plating in the cell.
Never charge a cell if it's near or below 32F.
Click to expand...
Click to collapse
Qnovo adapts the charging speed as a function of the battery temperature. It's a patented technology.
nreuge said:
Qnovo adapts the charging speed as a function of the battery temperature. It's a patented technology.
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Your point? My point is you can readily tell which charging mode it's in by observing the charge indicator/time interval.
Assuming the ambient room temperature isn't extreme.
blackhawk said:
Your point? My point is you can readily tell which charging mode it's in by observing the charge indicator/time interval.
Assuming the ambient room temperature isn't extreme.
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Click to collapse
It's not my point, it's well known that Sony Xperia uses the Qnovo technology. You can google it, it's documented...
nreuge said:
It's not my point, it's well known that Sony Xperia uses the Qnovo technology. You can google it, it's documented...
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Click to collapse
And Samsung uses Qualcomm.
Niether lets you to set a charge level limit so both are equally hard on the battery in one of the most important charge parameters.
Does Qnovo chipset revert to slow charging if set to fast charge if temp is too cold?
With Android 11, you can select 80 or 90 % maximum charge. I set it at 80, let's see tomorrow morning
Sho-Bud said:
With Android 11, you can select 80 or 90 % maximum charge. I set it at 80, let's see tomorrow morning
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That's pretty cool... if it works.
About time.
I aim for 64-70% most times though. An 80% lockout is certainly better than a 100% plate vaporizing charge.
Charging to 80% worked. Now I'll have to see if I get through 1 day at a single charge
Sho-Bud said:
Charging to 80% worked. Now I'll have to see if I get through 1 day at a single charge
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I run it down into the 40's then give it a 20% charge to bring back into the 60's.
Takes 10 minutes. That gives me 2-3 hrs SOT.
I simply charge when taking a break.
Theoretically even though it uses one full charge cycle worth of current throughout the day the actual damage to the cell is equivalent to 20% of a charge cycle.

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