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[Q] Fast charge battery

I usually let it charge over night. However I found today it is charged very fast: less than 2hours from 30% to 100%. I used galaxy note 2 usb charger. Do you have the same experience of charging or my battery has problems?

yes i same with you

When your battery was at 30%, it means the charger had to charge 1610mA (30% of 2300mA is 690mA). The Galaxy Note 2 charger has an output amperage of 2000mA. So you can imagine it won't take very long.
[update] Hm I misread note for tab. I have a tab 2 with a 2A charger. Not sure what the note 2 charger can output, but I'm guessing it will be above average.

Petrovski80 said:
When your battery was at 30%, it means the charger had to charge 1610mA (30% of 2300mA is 690mA). The Galaxy Note 2 charger has an output amperage of 2000mA. So you can imagine it won't take very long.
[update] Hm I misread note for tab. I have a tab 2 with a 2A charger. Not sure what the note 2 charger can output, but I'm guessing it will be above average.
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Thanks. I will check the output of note 2 usb charger and do the math.

Stock Nexus 5 charger also charges it from 0 to 100% in less than 2 hours.

Dont forget that the devices kernel determines how much mA is drawn from a charger and not how much may a charger is rated for
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Not all milliamps are the same
It seems to be a common misconception that the number of milliamp-hours of your battery and the milliamp rating of your charger have a fixed relationship.They don't. It does not automatically follow that a 2000mAh battery will take 2 hours to charge from a 1000mA charger, or that the charge current will be 1000mA. Charge current can easily - and safely - be higher than the mA rating of the charger. Or lower.
The N5 battery is rated at 3.8V 2300mAh (typical) and, crucially, 8.74 watt hours. A 5V 1000mA charger can supply a maximum of 5 watts (5 volts x 1 amp). Voltage converters within the N5 change this 5 watts of power from 5V to 3.8V to suit the battery - and this could be at about 1250mA (assuming a not-unreasonable 95% conversion efficiency).
The battery voltage varies with the state of charge, reaching about 4.2V when fully charged. Even then, the charge current could be as high as 1130mA without drawing more than 1000mA from the 5V charger.
An earlier poster pointed out that charging is under control of the CPU (I suspect instead a dedicated charging circuit but that's irrelevant) and it is very likely that a) the charging current varies significantly during the charging cycle and b) it is unlikely that the charging circuit demands precisely the maximum that the charger can supply. But it is quite likely that the actual current being put into the battery is numerically higher than that being drawn from the source. It's the power in watts that counts, not the number of milliamps.
Batteries are not perfect, meaning you don't get out all you put in. If the battery was completely flat you would have to put in more than 8.74wh in to bring it up to full charge (although a totally flat Li-ion battery is dead beyond redemption; the battery life shown on the screen is the useable life, not ultimate power capacity).
Sometimes the charger rating, battery capacity and charge time seem to line up, but that's more due to a happy accident than anything else. A 40,000mA charger won't juice your phone from flat in four minutes!
Batteries, and charging, are complex...

G1MFG said:
It seems to be a common misconception that the number of milliamp-hours of your battery and the milliamp rating of your charger have a fixed relationship.They don't. It does not automatically follow that a 2000mAh battery will take 2 hours to charge from a 1000mA charger, or that the charge current will be 1000mA. Charge current can easily - and safely - be higher than the mA rating of the charger. Or lower.
The N5 battery is rated at 3.8V 2300mAh (typical) and, crucially, 8.74 watt hours. A 5V 1000mA charger can supply a maximum of 5 watts (5 volts x 1 amp). Voltage converters within the N5 change this 5 watts of power from 5V to 3.8V to suit the battery - and this could be at about 1250mA (assuming a not-unreasonable 95% conversion efficiency).
The battery voltage varies with the state of charge, reaching about 4.2V when fully charged. Even then, the charge current could be as high as 1130mA without drawing more than 1000mA from the 5V charger.
An earlier poster pointed out that charging is under control of the CPU (I suspect instead a dedicated charging circuit but that's irrelevant) and it is very likely that a) the charging current varies significantly during the charging cycle and b) it is unlikely that the charging circuit demands precisely the maximum that the charger can supply. But it is quite likely that the actual current being put into the battery is numerically higher than that being drawn from the source. It's the power in watts that counts, not the number of milliamps.
Batteries are not perfect, meaning you don't get out all you put in. If the battery was completely flat you would have to put in more than 8.74wh in to bring it up to full charge (although a totally flat Li-ion battery is dead beyond redemption; the battery life shown on the screen is the useable life, not ultimate power capacity).
Sometimes the charger rating, battery capacity and charge time seem to line up, but that's more due to a happy accident than anything else. A 40,000mA charger won't juice your phone from flat in four minutes!
Batteries, and charging, are complex...
Click to expand...
Click to collapse
This. Well said.

Your suspicions are correct, it does have a dedicated charging circuit. This chip is responsible for charging. Input current appears to be capped at 1200mA. Measured with my DMM last night and never saw the phone draw more than 960mA when charging with the screen off. It stayed like that until the battery was around 95% charged, then gradually tapered off from there as the battery reached 100%.

G1MFG said:
It seems to be a common misconception that the number of milliamp-hours of your battery and the milliamp rating of your charger have a fixed relationship.They don't. It does not automatically follow that a 2000mAh battery will take 2 hours to charge from a 1000mA charger, or that the charge current will be 1000mA. Charge current can easily - and safely - be higher than the mA rating of the charger. Or lower.
The N5 battery is rated at 3.8V 2300mAh (typical) and, crucially, 8.74 watt hours. A 5V 1000mA charger can supply a maximum of 5 watts (5 volts x 1 amp). Voltage converters within the N5 change this 5 watts of power from 5V to 3.8V to suit the battery - and this could be at about 1250mA (assuming a not-unreasonable 95% conversion efficiency).
The battery voltage varies with the state of charge, reaching about 4.2V when fully charged. Even then, the charge current could be as high as 1130mA without drawing more than 1000mA from the 5V charger.
An earlier poster pointed out that charging is under control of the CPU (I suspect instead a dedicated charging circuit but that's irrelevant) and it is very likely that a) the charging current varies significantly during the charging cycle and b) it is unlikely that the charging circuit demands precisely the maximum that the charger can supply. But it is quite likely that the actual current being put into the battery is numerically higher than that being drawn from the source. It's the power in watts that counts, not the number of milliamps.
Batteries are not perfect, meaning you don't get out all you put in. If the battery was completely flat you would have to put in more than 8.74wh in to bring it up to full charge (although a totally flat Li-ion battery is dead beyond redemption; the battery life shown on the screen is the useable life, not ultimate power capacity).
Sometimes the charger rating, battery capacity and charge time seem to line up, but that's more due to a happy accident than anything else. A 40,000mA charger won't juice your phone from flat in four minutes!
Batteries, and charging, are complex...
Click to expand...
Click to collapse
Thanks a lot. It did look complicated. As long as the fast charging is normal, I don't worry too much.

Can anyone recommend an app that shows real time current draw? It would also be cool if the app showed how much power the phone is using in real time.
Sent from my Nexus 5 using Tapatalk

G1MFG said:
It seems to be a common misconception that the number of milliamp-hours of your battery and the milliamp rating of your charger have a fixed relationship.They don't. It does not automatically follow that a 2000mAh battery will take 2 hours to charge from a 1000mA charger, or that the charge current will be 1000mA. Charge current can easily - and safely - be higher than the mA rating of the charger. Or lower.
The N5 battery is rated at 3.8V 2300mAh (typical) and, crucially, 8.74 watt hours. A 5V 1000mA charger can supply a maximum of 5 watts (5 volts x 1 amp). Voltage converters within the N5 change this 5 watts of power from 5V to 3.8V to suit the battery - and this could be at about 1250mA (assuming a not-unreasonable 95% conversion efficiency).
The battery voltage varies with the state of charge, reaching about 4.2V when fully charged. Even then, the charge current could be as high as 1130mA without drawing more than 1000mA from the 5V charger.
An earlier poster pointed out that charging is under control of the CPU (I suspect instead a dedicated charging circuit but that's irrelevant) and it is very likely that a) the charging current varies significantly during the charging cycle and b) it is unlikely that the charging circuit demands precisely the maximum that the charger can supply. But it is quite likely that the actual current being put into the battery is numerically higher than that being drawn from the source. It's the power in watts that counts, not the number of milliamps.
Batteries are not perfect, meaning you don't get out all you put in. If the battery was completely flat you would have to put in more than 8.74wh in to bring it up to full charge (although a totally flat Li-ion battery is dead beyond redemption; the battery life shown on the screen is the useable life, not ultimate power capacity).
Sometimes the charger rating, battery capacity and charge time seem to line up, but that's more due to a happy accident than anything else. A 40,000mA charger won't juice your phone from flat in four minutes!
Batteries, and charging, are complex...
Click to expand...
Click to collapse
True. I never said there was a fixed relationship though. They do have a loose relationship. Charging with a 500mA charger will take longer than charging with a 2000mA one, since about every modern phone accepts a charging limit higher than 500mA.
Another aspect not addressed in my reply is that the charge process isn't linear. But without going into too much electronics, I just wanted to explain to the OP he shouldn't have to worry if he notices differences in charging times when using chargers of different amperage output.

Today's batteries are much improved
wolfca said:
Thanks a lot. It did look complicated. As long as the fast charging is normal, I don't worry too much.
Click to expand...
Click to collapse
That's the ticket. When used with the correct charger, a modern phone battery takes a couple of hours to charge fully, a bit longer with a lower-rated charger. Or you can top up a bit if you have a few minutes spare. It's much better than the early mobiles with Ni-Cd batteries that took overnight to charge. And required weightlifting training before you could even pick them up!

Can this phone support or charge with a 5v 3.5 amp charger? Is it faster? ZeroLemon

Next week getting a new Note 4 - and zerolemon 10,000mah battery!
I need to deep cycle battery 6-8 times to get phone to display the current vbbatt % correctly. The manufacturer for zerolemon says turn off fast charge and charge 12hrs each time.
That being said, with fast charge off, can I use a 5v 3.5 amp charger I see on amazon and possibly charge the phone faster than 12 hrs like normal is using a 2.1 amp charger?
Anyone tried this with let's say even the stock battery does the battery actually charge faster due to the increased amps or would it be a waste and still charges at the slower 2.1 amps?

I never deep cycled the battery and the longest discharge I got was 1 week with 16 hours on screen time...you just need to make sure you use an updated kernel with the zL fix.

The amperage rating is the max the charger can put out. The Note will draw the same amperage on either charger because they are both 5V.

ackliph said:
The amperage rating is the max the charger can put out. The Note will draw the same amperage on either charger because they are both 5V.
Click to expand...
Click to collapse
But will the phone charge faster on 3.5 amps at 5v vs the 1.5 amp or 2.1 amp the stock charger puts out? I am getting ZeroLemon and need to deep cycle the battery a few times and am trying to have it fully charged in less than the standard 12 hrs - was hoping a charger with more amps would cut down on the 12 hrs lol
http://www.amazon.com/gp/product/B00WN86VYQ/ref=ox_sc_act_title_8?ie=UTF8&psc=1&smid=A3RPN0HBLXDN8Z

i just used the stock fast charger on my zerolemmon with fast charge on and i never let it go the full 1 hours. Ive had insane battery life with it so i dont think it matters

drtechnology said:
But will the phone charge faster on 3.5 amps at 5v vs the 1.5 amp or 2.1 amp the stock charger puts out? I am getting ZeroLemon and need to deep cycle the battery a few times and am trying to have it fully charged in less than the standard 12 hrs - was hoping a charger with more amps would cut down on the 12 hrs lol
http://www.amazon.com/gp/product/B00WN86VYQ/ref=ox_sc_act_title_8?ie=UTF8&psc=1&smid=A3RPN0HBLXDN8Z
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Click to collapse
Your Note 4 will draw a maximum of 1.9A on a 5V standard charger and a maximum of 1.66A on a 9V Quickcharger. If you multiply these values, you will get your "charging speed" in Watts: The maximum is 9.5W on normal charger and 15W on a quick charger.
Using a higher rated normal charger (eg 5V/3A) will NOT INCREASE charging speed. The Note 4 will never draw more than 1.9A on 5V.
Using a lower rated normal charger (eg 5V/1A) WILL DECREASE the charging speed. The Note 4 will notice that it cannot get 1.9A from the charger and drop the current. Bad and/or long cables can also influence the charging speed negatively.
Also noteworthy: Quick charging will only work when screen is off. As soon as you turn your screen on, the charging speed when connected to a quick charger will drop from 15W to an extremely slow 5W. The only fix for this horrible Samsung joke is a custom ROM like CyanogenMod.
You can charge your Zerolemon battery nicely with the original Quickcharger that came with the phone. That will do 15W and is as fast as you can possibly charge.

joeuser said:
Your Note 4 will draw a maximum of 1.9A on a 5V standard charger and a maximum of 1.66A on a 9V Quickcharger. If you multiply these values, you will get your "charging speed" in Watts: The maximum is 9.5W on normal charger and 15W on a quick charger.
Using a higher rated normal charger (eg 5V/3A) will NOT INCREASE charging speed. The Note 4 will never draw more than 1.9A on 5V.
Using a lower rated normal charger (eg 5V/1A) WILL DECREASE the charging speed. The Note 4 will notice that it cannot get 1.9A from the charger and drop the current. Bad and/or long cables can also influence the charging speed negatively.
Also noteworthy: Quick charging will only work when screen is off. As soon as you turn your screen on, the charging speed when connected to a quick charger will drop from 15W to an extremely slow 5W. The only fix for this horrible Samsung joke is a custom ROM like CyanogenMod.
You can charge your Zerolemon battery nicely with the original Quickcharger that came with the phone. That will do 15W and is as fast as you can possibly charge.
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Click to collapse
Wow. Good info. Thx. Now a ton with a hack to draw more amps lol. Hmmmm lolol

Battery lasts longer after normal recharging than turbo charging

Hi,
I noticed that when I recharge it with a charger that is only 650ma the battery last much longer than with turbo charger that came with the phone.
Even in standby after recharged it takes one hour to consume only 1% but after turbo recharging it takes about 10 min to drop 1%.
Is there anyone experiencing something like that?

Funny it is.... The case is opposite for me... Although I use Transomart QC 2.0 charger. My battery lasts longer when I charge it with quick charger compared to standard 1 Amp chargers.

That´s so weird.
I am preparing a comparison to figure out what's happening.

It happens the same here. I've a Aukey turbo charger and the battery drains faster

pesimeao said:
It happens the same here. I've a Aukey turbo charger and the battery drains faster
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Click to collapse
I also got Aukey and it's the same

There's no way to actually know the charge (in mAh) of a battery without draining the battery. The way that phones estimate the charge is by measuring the voltage of the battery. Quick Charge 2.0 (supported by the Moto X 2014) uses a higher voltage to charge the battery faster. This can make the battery hit max voltage before it is actually fully charged. That is why Quick Charge always advertises how quickly it gets to 80%. To get to full charge (not just when it shows 100%, but when it is actually fully charged) will take about the same time as a standard charger.

Heat and Turbo charge destroys your battery.

if i turbo charge , my phone will suddenly die when it's between 10-20%. W/ regular charging I get sudden death at 6-8%

i use a moto razr 850mah charger and solved the 8% sud power off, took 2 charge cycles from death to 100% leaving it overnight. Now battery works as it should

.
As I've been reading around (can't recall specific scientific data), the faster you charge the battery, the less capacity it can hold. So it makes sense that it lasts longer if you charge it slowly. I don't know how much would be the difference tho.

It is normal in my opinion. Slower charging is also healthier for the battery and usually will last longer

Has anyone ever used a wireless charging pad with the phone. I bought a stick-on one from amazon and it charges fine,,,slower but fine. However, I noticed that it tends to get suck at certain levels and if I take off the wireless charger at say 89 percent,,,it takes less than a min to go to 100 percent charged?

Recomendeed is charge with Motorola original charger of this device, i mean 1150mAh dual port charger

Anyone here with experience of using Motorola's Turbopower 15 wall charger? I'm thinking to buy one, because waiting for 1 hr to charge to 100% is quite annoying.

Charging speed

To power up, you consume Red Bull. But your phone just needs its adaptive fast charger. Rate this thread to express how quickly the Elephone S8 can charge. A higher rating indicates that it charges extremely fast.
Then, drop a comment if you have anything to add!

Not really fast quite slow to be honest, apparently they didn't sell the mobile with fast chargers, they could have just added a couple pound on top like any other manufacturer and add a fast charger.

It's worth noting that the charger it shipped with will charge the phone somewhat faster than other chargers I've tried, charging the device at about 1.9 mAh vs. 1.5 mAh for a standard charger in my tests
That said, it's still not what most people think of as a modern fast charger.
If you want 0 to 80% in 20 minutes, this is not the phone for you. ?

Unable to see "5V3A USB-PD" charging speed at all

I've had my 7 Pro 8/256 for a week now and was really hoping to see USB-PD 5V3A charging. In fact, I ordered a USB-PD USB-C power bank specifically for this.
I've also tried my Aukey PA-Y10 46W Wall Charger as well. USB-PD (PDO) 5V 3A | 9V 3A | 12V 3A | 15V 3A | 20V 2.3A.
USB-C to C Cables, U Green 3ft and Aukey 3ft.
When I connect the power, it doesn't indicate "charging rapidly" as it does on Pixel 2/3. Tested using Ampere. 1.7-1.9A even when the battery is only at 20-40% Far cry from 3A max.
When connected to the Dash Charger from my OP5 with OP5 cable, I get the standard 5V4A (3.3A in Ampere) of Dash with a Charging Rapidly logo and a blue lightning bolt.
Were we lied to? The article says it is supported but there is nothing indicated during my real world testing to show it actually is any faster than using a 5V2A charger. I livechatted with OP Support yesterday and they did confirm that OP7 Pro supports 5V3A USB-PD spec but the rep didn't understand what I was asking when there was no notification for rapid charging.
https://www.xda-developers.com/oneplus-7-pro-usb-pd-hdmi-variable-refresh-rate/

yeah on my PD charger it takes 1 hour 50 to charge from 20 to 100

If you want to see the actual rate of charging, I recommend using an app called 3C Battery Monitor. I use it to keep track of my phone's rate of battery drain when using certain apps or how fast something is actually charging. In order to save battery, I only have it logging the battery usage every 10 minutes but you can set the rate to be faster.
I'm my first picture below, I was purposely draining the battery down to 1% to test out the speed of the warp charger, but it was only sampling every 10 minutes.
My second picture is set to every minute.
Give it a try to test out the PD charging as you will have actual mA/hour figures to compare.

Thanks. Confirmed today that it does do 5V3A but doesn't show as "charging rapidly" using 3C Battery Monitor.
It is about 2.9-3.0A from about 25% until 70%. From 0-25% is about 1.5-1.9A and from 70% onwards it slowly decreased until it reaches 100%.
In total from 17% to 100% took 1h 47 mins. Not exactly fast but acceptable.
With the Warp Charger, it's 0 to 100% in about 1 hour flat. With a Dash Charger, it would be about 1 hour 30.
iPhone XS Max charges 0-100% in 2 hours 20 minutes with a 2.4A adapter