Any effect on battery life or any other considerations to keep in mind when trading charges between different devices? Nexus 7 charger outputs 2A while S3 charger outputs 1A
I always charge my S3 using my Nexus 7 charger and have had no differences in battery life. Except charging is a lot faster.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Same here. My S3 charger is still in the box. N7 charger is my go to charger!
itsalexaye90 said:
I always charge my S3 using my Nexus 7 charger and have had no differences in battery life. Except charging is a lot faster.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
Well if you do in fact see difference in charging speed, then why would not Samsung supply this kind of charger with S3 instead of 1A one? I assume this would be another feature to brag about (now charging twice as fast as ordinary charges or something). So I would assume it's either not true (placebo effect) or it's infact shall be having bad influence on battery. We need somebody with electrical degree probably to render final verdict.
BlackBerry has a rapid charger for the Playbook and they actually tell you there's no problems to use it on their handsets. I think the reason for not including it is that the price is so much higher - retail $50 vs $25. Same as iphone and ipad chargers.
I use my Play book charger almost exclusively with my S3 - and the Playbook has sat unused on the shelf for over 6 months.
Charging speed is controlled by the kernel, so you could technically charge with any charger in existence but the kernel will only allow the phone to charge at a preset amount. The stock charger is under this voltage cap so other chargers will charge faster, but as I said, it is capped. So I wouldn't worry about it.
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2
corythug said:
Charging speed is controlled by the kernel, so you could technically charge with any charger in existence but the kernel will only allow the phone to charge at a preset amount. The stock charger is under this voltage cap so other chargers will charge faster, but as I said, it is capped. So I wouldn't worry about it.
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2
Click to expand...
Click to collapse
So reported faster charging is placebo?
artisticcheese said:
So reported faster charging is placebo?
Click to expand...
Click to collapse
As I said, the in box charger will not max out the phones charging speed, so other chargers can and will charge faster, to a certain extent.
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2
I've tried with my OEM sgs3 and sony vita charger. The phone draws the same current on both. So yes placebo. And to answer if charging at a higher current is bad for the battery, it depends on the battery cell. But usually charging at a higher current does shorten it's life.
Sent from my SGH-I747 using xda premium
yea i use a bb charger for my s3 im not sure if it charges faster then the samsung one but it doesnt take long to go from 10% to 100%
55nxb said:
I think that as long as we don't often mobile phone boot shutdown of the battery life is not how to reduce, I take you the wrong phone life is very good can achieve more than 40 hours of time it brought me a lot of good
http://www.elewarehouse.com/ANDIDA-...n-Charger-For-Samsung-Galaxy-Y-Duos-32979.htm
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What did you just say?
callen81 said:
I've tried with my OEM sgs3 and sony vita charger. The phone draws the same current on both. So yes placebo. And to answer if charging at a higher current is bad for the battery, it depends on the battery cell. But usually charging at a higher current does shorten it's life.
Sent from my SGH-I747 using xda premium
Click to expand...
Click to collapse
What about in reverse? Can I charge Nexus 7 with lower amperage S3 charger? Any ill effects?
I use a Motorola charger because it has two usb females
Sent from my SGH-I747M using xda app-developers app
As long as a USB charger puts out the required 5v it will do fine. The device will pull as many amps as it wants out of the charger up to the max capacity of the charger. If the charger cant put out as many amps as the device wants, the device will just charge slower at the lower amperage.
As slower charging heats up batteries less and stresses them less, this isnt a problem at all unless you are in a hurry. I charge mine at night and could care less how fast it charges.
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2
Over drawing current from a charger isn't a great idea. Most chargers are designed to run at 80% max current for short periods if you run them higher they can do a number of bad things.
Sent from my SGH-I747 using xda premium
Related
Can the GT 10.1 plug into any USB car charger?
I was looking at this from Walmart's website
If so, it'll be a lot cheaper than the car charger Samsung is selling
http://www.walmart.com/ip/Scosche-Dual-USB-Car-Charger/5691047
Sent from my GT-P7510 using Tapatalk
I've noticed that plugging into various USB wall chargers won't work. The only one that will work is the one that came with the tab. I am pretty sure this is because the Samsung one is a 2amp charger and all of my others are less than 1amp, 850mah specifically. If you can find a 2amp car charger then it should work fine. Otherwise, the charging indicator will show that it's connected to a charger but will have a red x on in it meaning that it's not charging or can't charge. I suppose anything too low can't charge the battery fast enough to make up for the battery drain
i bought a $10 2 port charger from amazon for the ipad/galaxy tab 7". it works fine for both tablets and the gt10.1.
madsquabbles said:
i bought a $10 2 port charger from amazon for the ipad/galaxy tab 7". it works fine for both tablets and the gt10.1.
Click to expand...
Click to collapse
Do you have the link?
Make sure it has a 5v 2a output.
Sent from my GT-P7510 using XDA Premium App
X10D3 said:
Make sure it has a 5v 2a output.
Sent from my GT-P7510 using XDA Premium App
Click to expand...
Click to collapse
Ok. Thanks.
Sent from my GT-P7510 using Tapatalk
oh......i see.
X10D3 said:
Make sure it has a 5v 2a output.
Sent from my GT-P7510 using XDA Premium App
Click to expand...
Click to collapse
Sent from my SHW-M110S using XDA App
I bought this one from deal extreme. Its less than $3.95 with free shipping. Comes with 2 usb ports. I have been charging my iPad and Dell Streak tablet without any problem. Yes it does charge 2 devices at same time. Its also small, doesn't get hot, doesn't make any noise and looks good. Highly recommended.
http://goo.gl/u00Gz
media_11 said:
I bought this one from deal extreme. Its less than $3.95 with free shipping. Comes with 2 usb ports. I have been charging my iPad and Dell Streak tablet without any problem. Yes it does charge 2 devices at same time. Its also small, doesn't get hot, doesn't make any noise and looks good. Highly recommended.
http://goo.gl/u00Gz
Click to expand...
Click to collapse
I will definitely look into that particular model.
Sent from my GT-P7510 using Tapatalk
figurine said:
I've noticed that plugging into various USB wall chargers won't work. The only one that will work is the one that came with the tab. I am pretty sure this is because the Samsung one is a 2amp charger and all of my others are less than 1amp, 850mah specifically. If you can find a 2amp car charger then it should work fine. Otherwise, the charging indicator will show that it's connected to a charger but will have a red x on in it meaning that it's not charging or can't charge. I suppose anything too low can't charge the battery fast enough to make up for the battery drain
Click to expand...
Click to collapse
it's. still charging. you can get a trickle charge even from standard USB. s3ms that this is one of the only tegra2 tablets that can.
I heard that the trnaformer can but mine doesn't. it should work if I had USB.3.0.
madsquabbles said:
it's. still charging. you can get a trickle charge even from standard USB. s3ms that this is one of the only tegra2 tablets that can.
I heard that the trnaformer can but mine doesn't. it should work if I had USB.3.0.
Click to expand...
Click to collapse
So if l'm using it to watch videos and music while on wifi, do you think that it'll maintain its charge while trickle charging?
I bought a couple of these adapters;
http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=330565218553&ssPageName=ADME:X:RTQ:AU:1123
Now I can charge my Galaxy Tab 10.1v off ANY USB port - very very handy. Works just very well from a PC USB port too.
figurine said:
So if l'm using it to watch videos and music while on wifi, do you think that it'll maintain its charge while trickle charging?
Click to expand...
Click to collapse
i don't think the amount coming in will equal the amount discharged. depends on the brightness of the screen and how much cpu you're using. mine was charging veeeerrry slowly while reading the steps to root and the screen on, other than that it was idle and still slowly charged.
media_11 said:
I bought this one from deal extreme. Its less than $3.95 with free shipping. Comes with 2 usb ports. I have been charging my iPad and Dell Streak tablet without any problem. Yes it does charge 2 devices at same time. Its also small, doesn't get hot, doesn't make any noise and looks good. Highly recommended.
http://goo.gl/u00Gz
Click to expand...
Click to collapse
I also bought this. Arrived in 3 weeks from China, but free shipping, or $0.01.
They seem very good. There is some hard to read text (even in English) on the plastic part that tells you the top port is for iPad (2.1A) and the bottom is for others (1A). I've put a photo below of the guts. Seems it's definitely more than just some cheap resistors and a fuse.
I tried it in my vehicle and you still get the red X with a OEM cable with the device powered on, but NOT if you use an adapter plug found on eBay.
Do yourself a favor and order 3-4 of each. =)
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figurine said:
I've noticed that plugging into various USB wall chargers won't work. The only one that will work is the one that came with the tab. I am pretty sure this is because the Samsung one is a 2amp charger and all of my others are less than 1amp, 850mah specifically. If you can find a 2amp car charger then it should work fine. Otherwise, the charging indicator will show that it's connected to a charger but will have a red x on in it meaning that it's not charging or can't charge. I suppose anything too low can't charge the battery fast enough to make up for the battery drain
Click to expand...
Click to collapse
Nope - you need a 2A charger, but any old 2A charger won't do. Most are designed for the iPad, which uses resistive voltage dividers in the charger to signal the presence of a dumb charger. Specifically the iPad looks for 2.0 volts on one of the data pins and 2.8 on the other.
The Tab expects D+ and D- to be shorted together and somewhere around 1.2-1.24 volts.
It IS possible to make iPad chargers (confirmed on Scosche reVIVE II) work as follows:
Bridge D+ and D- with a solder blob.
Remove the resistor that was the upper part of the 2.8v voltage divider (i.e. between the data pin and +5v).
At this point the charger should output around 1.2 volts on D+ and D-.
Hi, I just had my SGSII for couple of days and noticed inconsistent battery charging rate which I've ruled out that is not charger/cable dependent. So I would like to ask if anyone have similar issue or could offer an explanation.
Basically I use the phone charges sometimes at 20%/hour, and sometimes at 40%/hour. I've been using both the samsung stock charger & iphone's 2A charger and there is no correlation between the charging rate & the charger I use. I use debloated Samsung ROM and the faux kernel.
The only other explanation that it could be is that when I get 40% charging rate, I was using 7b4(I think, not entirely sure), at 20%/hour, i was using stock, faux 7r2 or 9r.
below are the screen shot, among 5 times I've charged the phone #2 & #3 were at 40%/hour, the rests were at 20%/hour:
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shinew said:
Hi, I just had my SGSII for couple of days and noticed inconsistent battery charging rate which I've ruled out that is not charger/cable dependent. So I would like to ask if anyone have similar issue or could offer an explanation.
Basically I use the phone charges sometimes at 20%/hour, and sometimes at 40%/hour. I've been using both the samsung stock charger & iphone's 2A charger and there is no correlation between the charging rate & the charger I use. I use debloated Samsung ROM and the faux kernel.
The only other explanation that it could be is that when I get 40% charging rate, I was using 7b4(I think, not entirely sure), at 20%/hour, i was using stock, faux 7r2 or 9r.
below are the screen shot, among 5 times I've charged the phone #2 & #3 were at 40%/hour, the rests were at 20%/hour:
Click to expand...
Click to collapse
The device will charge the fastest when it is turned off. If you are streaming music, tethering and running other applications, it will obviously charge slower.
My phone has always been on idle when it's being charged so far. what's your charging rate?
shinew said:
My phone has always been on idle when it's being charged so far. what's your charging rate?
Click to expand...
Click to collapse
Depends on what the phone is doing. If its idle and there are a lot of background processes going on, the rate is slower.
Sent from my Hercules using XDA App
I believe it has to do with chargers in my case.
Since October I've used only two chargers the Samsung one that comes with the phone and my Kindle 1 charger.
Samsung: 40-50%
Kindle: 10-20%
90% of the time the phone is idling.
alright, i charged the phone again using the the stock charger, and it was about 40%/hour on standby mode. Weird I thought I tested it using the OEM charger and it was also 20%/hour. guess I remember it wrong...
ahh.. .here finally found the original topic http://forum.xda-developers.com/showthread.php?t=1332522&highlight=charging
there was a lot of good info on that one, as well as some unexplained behaviour, the same you are trying to figure out
all i know is that yes 2A charger does work, regardless of what the tester shows
and the Battery Widget App, i use it too, and i have to agree it's not very accurate, as it will only show you the actual rater after 2 minutes of charging it
however it's very close to the real values, specially when it's charging and the current flow, i get readings that matches the input quality of the charger, as in USB, Wall, 1 Amp, 2 Amp, 0.7 Amp, 0.45 Amp and so on
there is also the possibility of risking to be stuck at 100% when not using them OEM charger. I have couple of 3rd party charger lying around, so I'm going to try them one by one and see which one works. At least now i know that the apple charger does not work well with the phone(at least the older one, stuck at 100% after charged, and slow charging rate despite it's rated at 1.5Ah+, going to try my newer ipad2 charger).
as for the 100% stuck, as some other have pointed out it only happens when you use AC chargers of any kind
charging via USB doesn't cause the problem
using the original Samsung AC to USB charger also does not cause the problem simply because it's still using USB charging
i had another original OEM Samsung charger that i plugged in and it was also causing the 100% stuck issue, so it's just some sort of confirmation the phone seems to be expecting from a USB power/data cord but is not found on an AC power cord
AllGamer said:
charging via USB doesn't cause the problem
using the original Samsung AC to USB charger also does not cause the problem simply because it's still using USB
Click to expand...
Click to collapse
The only time I encountered this issue was when was using a USB charger.....
Sent from my Hercules using XDA App
i recently discovered that many different chargers charge at different speed not correlating to their labeled amperage,
i build a testing rig that contains a resistor at 0.1A and measured its voltage in order to give me an accurate result of the current of each setup.
i believe this will help you all buy the right charger
this is a picture of my testing rig:
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i tested an S2 and an S3,
i used:
original note charger (and its cable)
original S3 charger (fixed cable)
cheap htc charger off eBay
and a combo charger designed to charge a phone and a battery at the same this.
here are the results:
thanks
cool info!
thanx for this info!!!
never thought, the cable could make any difference!
I recently realized. that an org. sam charger from amazon doesn´t power my phone up properly..... the charging process takes from 20% to 100% nearly 10 hours....
the chrager looks original but the cable doesn´t..... so i will give it a try with on org. cable
What do the values on the right of the chart represent? The charge rate of the charger?
------------------------------------
If it was easy you'd of hired the guy at Home Depot to to it.
Siyah Kernel
:good: When u r on Siyah Kernel u can reduce the changing time; it is a great and easy way too.....
gilbequick said:
What do the values on the right of the chart represent? The charge rate of the charger?
------------------------------------
If it was easy you'd of hired the guy at Home Depot to to it.
Click to expand...
Click to collapse
the values on the right are current(I) measured at miliamps (mA)
bapsack said:
thanx for this info!!!
never thought, the cable could make any difference!
I recently realized. that an org. sam charger from amazon doesn´t power my phone up properly..... the charging process takes from 20% to 100% nearly 10 hours....
the chrager looks original but the cable doesn´t..... so i will give it a try with on org. cable
Click to expand...
Click to collapse
the original charger does not have a removable cable!
its a fixed cable
Addymore said:
:good: When u r on Siyah Kernel u can reduce the changing time; it is a great and easy way too.....
Click to expand...
Click to collapse
this was done on a stock rom (4.1.2)
the original charge comes with a removable cable.
Sent from my GT-I9300 using xda app-developers app
mputtr said:
the original charge comes with a removable cable.
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
x2, my original charger for my S3 had a removable micro-usb cable.
It charges from ~20% to 100% in about 2hrs
mputtr said:
the original charge comes with a removable cable.
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
+1
Sent from my GT-I9300 using xda premium
well i can only speak for my german s3....
and this had a removable cable!
on my old i9000 it s fixed!
cheers
Whoa !
Great info mate - i like such stuff more than Roms and kernel
Very cool!!!
maybe its a regional thing,
i can see that usually the original S3 does have a removable cable
The USB spec states 500ma is the max you can push over the USB interface (I think USB 3 is higher though). Most electronics will tend to honor this 500ma limit. I'm not sure if it's just common practice or an actual standard, but shorting the 2 data pins together ignifies that you are connected to an AC charger that can supply a higher amperage. By default our phones & the original SGS phones will charge at 500ma max. However if you plug in a charger with the 2 data pins shorted (our OEM chargers are like this), or short them together yourself along with a capable charger, your phone will charge at 700 or 750ma (forget which offhand).
Some more info about hacking the charger config & dock mode stuff at http://forum.xda-developers.com/showthread.php?p=28342378.
Sent from my Transformer using Tapatalk 2
resistor value
Do you mean a resistor with 0.1ohms not 0.1A? What resistance did you use for this setup? Very interesting and helpful information! Although, I'm very curious why a different cable would give you different power numbers. Does the charger measure resistance on the cable and then lower the maximum charge current as a result? I can't really see any other way the charger could tell which cable you are using unless the charger adds some capacitance between wires or some other discrete component.
I use the charger supplied with the Amazon Kindle Fire. That charger charges my phone really fast. I think a little faster than the stock Samsung one
Very cool. Anyway you could get your hands on an Nexus charger?
Wouldnt it be better to slow charge it like a car battery? If you trickle charge a car the battery lasts way longer than on a high amp charge. This seems to work on my extended battery I ditched the 1amp for a 700MAh and charge lasted 4 days with almost 7 hours screen time
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
yup. a slower charge is better for your battery than a fast charge. (based on what i've been reading on with battery tech)
mputtr said:
yup. a slower charge is better for your battery than a fast charge. (based on what i've been reading on with battery tech)
Click to expand...
Click to collapse
thats what ive always been told. also heard the battery life span decreases with fast charges.
I've been hunting for an extra, high quality, 2A USB charger for my devices - but I didn't want to pay $25-$30 to get a Samsung or Asus 2A USB charger. And then I came across this blog entry by Ken Shirriff where he went and reviewed 12 different USB chargers including genuine and fake apple chargers + other brands.
http://goo.gl/rym3M
Really good and informative post. Definitely recommend a read. For the Cole's notes version, apple makes great USB chargers ... but not the best. The best USB charger in this review actually turned out to be the USB charger that came with the ill-fated HP TouchPad. This charger has very low noise and voltage drop characteristics.
What's more, you can actually get these great HP chargers for $15 on eBay. Or via Kijiji for $15 if you're in the Toronto area.
Mine is off Kijiji and here are logged screenshots of my GNex charging from 12% to 100% with both the Samsung charger that came with it and the HP Charger.
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FYI, I use this charger for both my GNex and my N7. I've posted OEM vs HP Charger graphs from my N7 here.
I see nothing in those graphs that makes me think one is better than the other. The lines are virtually identical, they go from 12%-100% in the same amount of time.
Sent from my Galaxy Nexus using xda app-developers app
RyanTX said:
I see nothing in those graphs that makes me think one is better than the other. The lines are virtually identical, they go from 12%-100% in the same amount of time.
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
It doesn't buzz like the stock one and it doesn't get hot when charging the GNex at ~1A like the stock one does. As well, this charger is capable of handling tablet charging as well. Guess I should have indicated all this in my first post.
RyanTX said:
I see nothing in those graphs that makes me think one is better than the other. The lines are virtually identical, they go from 12%-100% in the same amount of time.
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
The post is rating the chargers on far more than just how quickly it charges a phone.
Just to add my two cents, anecdotally, before even seeing this post, I was going to say that the touchpad chargers have been the best I've used also. Glad i bought 4 or 5 of them for $5/each when hp went on their firesale binge.
I read that same article and bough two of them months ago for $6. They are great. They do have a slight buzz if you put your ear up to them but nothing like the samsung one. Highly recommend them.
Interesting article. Not really sure what to make of it though, beyond not buying counterfeit chargers?
I've actually got a bunch of those HP chargers for my Gnex. I got them straight from HP for $4 each last summer. Very awesome chargers.
Is it healthy to charge the battery that fast ?
Cupellom said:
Is it healthy to charge the battery that fast ?
Click to expand...
Click to collapse
I think its not.
Sent from my Galaxy Nexus using Tapatalk
Cupellom said:
Is it healthy to charge the battery that fast ?
Click to expand...
Click to collapse
palco2 said:
I think its not.
Sent from my Galaxy Nexus using Tapatalk
Click to expand...
Click to collapse
Well... the battery charges at the same speed for both the stock 1A charger and the HP 2A charger. The device itself regulates how much power it will draw, and drawing 1A from a 2A charger is surely more efficient and will result in a longer lasting and better charger, as well as one that can be used for tablets and other USB devices that want to draw more than 1A. I wonder if you can take the 2A charger and put a USB Splitter or something on there and charge 2 1A devices at the same time... I'd imagine so.
I use my OEM Galaxy S4 charger. It charges all of my devices faster than any other charger I've ever tried.
I just got the LG G3 a few days ago and its charging at a rate of over 18+ amps! (Over 18000+ mA). My phone was on 35% about 10 min ago. Now it is at 63%. This is the first time i checked the charge current for this phone. My previous phone was a galaxy s3 and it averaged a charge current of 0.8-1.1 amps. I am not sure if this is a good or bad thing. My phones temp doesnt seem hot, also its charging incredibly fast. If anyone has had this happen please reply. I know this is not normal. I took a screenshot of the charge monitor. The app i used. To test the currents was "Battery Monitor Widget". In the picture you will see a red circle with a arrow pointed to it. That is the time when i took the charger off and replaced it with my other adapter but kept using the same cable.
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Grizzie said:
I just got the LG G3 a few days ago and its charging at a rate of over 18+ amps! (Over 18000+ mA). My phone was on 35% about 10 min ago. Now it is at 63%. This is the first time i checked the charge current for this phone. My previous phone was a galaxy s3 and it averaged a charge current of 0.8-1.1 amps. I am not sure if this is a good or bad thing. My phones temp doesnt seem hot, also its charging incredibly fast. If anyone has had this happen please reply. I know this is not normal. I took a screenshot of the charge monitor. The app i used. To test the currents was "Battery Monitor Widget". In the picture you will see a red circle with a arrow pointed to it. That is the time when i took the charger off and replaced it with my other adapter but kept using the same cable.
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That is wicked, though it had me scared! I tested wireless charging (I bought an insert for the back from AliExpress.com to make it Qi compatible) and also tested from the power adapter given to me with the phone. Below the yellow line is wireless charging and above is with the stock power cable. Notice that they are 0.5mAh different, but the mV is the same, so they charge about the same. Interesting! I'll have to test this further.
Cheers for posting this!
This could be why I burnt through a series of chargers a few weeks ago.....
Ok so I am now using the standard charger that i get up to 1800mA with. I gotta say though my charger that i modified charged my phone lightning fast with no heating issues as well or damaging of the battery. Unfortunately the modified charger can only be used with the newer phones. I had it tested with the galaxy s4, galaxy s5, and the htc one m8. But the only newer phone that didnt work with was the one plus one. The LG G3 definitely had the highest amp charge out of all of the phones. I will be doing more tests soon. But just to be safe i will be using my normal charger while i am away from the phone or when im sleeping. Here is the screenshot of the current charge with the stock charger.
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Here is the testing results with the htc one m8.
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Highly doubt that app is reporting accurately.
Omg can believe you guys are missing the mA flow ... +5197mA (+199.88%) per hour
These aren't output from your power adapter, it's a tally of how many mA have been recorded. Also from looking at your notification bar you have two blue tooth devices one of which isn't fully charged. There's a good chance this app doesn't account for that.
If you are using the standard charger, you can get 9 watts from it. No more. Given the voltage of the battery of 4v, there's little reason to think you could really be charging more than about 2200mA actual current into device, probably less due losses. For the the a 3000mAh battery, this means about 75 minutes to charge. I think the app is reporting something else or we are miss interpreting the data.
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