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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Click to collapse
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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Click to collapse
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.
Related
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!
The stock charger states it has 1500mA, but my phone doesnt load faster with it then with a 750mA one from an old Samsung phone. 1% in 1:15 Minutes on both.
Also if i use the phone while charging the battery level drops again or charges slower. The stock charger with its 1500mA should have enough juice to compensate for that.
Then i have a 1000mA USB charger, with that the Z knows no limits, it takes more out than the charger can handle, 1% in 50 seconds (that means you can have your battery full in 1,4 hours instead of 3,2 hours). But it runs hot and shuts down.
Whats wrong with my stock charger?
re
It is possible that the battery (and the integrated charge chip) limits the maximum ammount of current to prevent overheating and too rapid charging of the battery. You have to know that Li Ion charging should be regulated by current, voltage and battery temperature and charging may even stop before full charge if the battery heats up too much - the case when U are using a high performance tasks, e.g. 3d gaming and charging in the same time. I have heard that some users even use weaker chargers (350-500mA), which means slow charge, but this way they extend the battery capacity and life.
Still the 1500mA charger should not be slower than the 1000mA one.
Also if i'm using the original 1500mA charger and turn the device on it still should charge the battery and not lose the charge.
..
I've done some heavy gaming and other heavy stuff while charging from pc via usb and battery was charging a bit slower but that a'll.
[email protected] from XDA premium
Hi all!
As you probably know in most cases the standard maximum voltage of a Li-Ion or Li-Pol battery is 4200 mV, and according to the Theory, it's not recommended to exceed this limit because it dramatically shortens a battery life.
I found out that when my HTC ONE is plugged to a charger and fully charged the battery shows its voltage about 4330-4336 mV! One may guess it's because the device is connected to the charger so I unplug it and the voltage drops to about 4250-4260 mV BUT anyway it's more then the standard limit 4200 mV.
I would I ask you to check your devices what the voltage do they show when plugged and fully charged and when unplugged of the charger?
I just wonder to know is it normal and there is no trouble or I've got a defective device with a not properly working battery controller.
Thanks for response in advance.
PS To see a battery status dial *#*#4636#*#*
The nominal voltage of LiPo batteries has recently moved from 3.7 to 3.8V. I suspect HTC has managed to get the charge profile correct. Don't place too much emphasis on what you read from some guy on the internet.
Recent batteries from, for example, HTC ONE X+ also have nominal voltage 3800 mV but nevertheless they stop charging at 4200.
ninelo said:
Hi all!
As you probably know in most cases the standard maximum voltage of a Li-Ion or Li-Pol battery is 4200 mV, and according to the Theory, it's not recommended to exceed this limit because it dramatically shortens a battery life.
I found out that when my HTC ONE is plugged to a charger and fully charged the battery shows its voltage about 4330-4336 mV! One may guess it's because the device is connected to the charger so I unplug it and the voltage drops to about 4250-4260 mV BUT anyway it's more then the standard limit 4200 mV.
I would I ask you to check your devices what the voltage do they show when plugged and fully charged and when unplugged of the charger?
I just wonder to know is it normal and there is no trouble or I've got a defective device with a not properly working battery controller.
Thanks for response in advance.
PS To see a battery status dial *#*#4636#*#*
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Click to collapse
The new chemistry battery in this phone means it should hit around 4300 mV fully charged.
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.
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