Develop Bugs

[Q] Real 2A car charger. Which one??

Yesterday I've been navigating again with Navigon on my SGS2, but unfortunately it slowly drains my battery. When using google maps it dous charge the phone. So apperently Navigon is using a lot more 'juice' compared to Google map navigation.
Do you people know a charger (I assume one of 2A, while my own charger is an 1A charger) which does charge the phone with bluetooth, gps and Navigon running?

I bough a 2.1A car charger from belkin and I still have battery drain.
Even with the phone detecting it correctly as AC CHARGEr.

Hmmm that's to bad
Ordered a 2A charger from ebay myself.... But I doubt it will work, especially after reading your message.
I think the phone only takes a maximum of Amps for charging, even though it uses more. Resulting in a slow battery drain.

Note that it will stopped charging if the battery gets too hot to avoid damage or possibly exploding the battery.
Obviously having a higher rated charger will heat the battery more, so make sure the phone has its back ventilated, and try avoiding direct sunlight.
Read of several people that had this issue, but got their phones charging when avoiding overheating it.
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Try the Rockfish premium charger. It's 2A and looks nice.
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has anyone had any luck with the motorola charger? I bought one for my nexus one + car dock and it always worked fine... have yet to have a chance to use it for my SGS2 though..

Mixy said:
Note that it will stopped charging if the battery gets too hot to avoid damage or possibly exploding the battery.
Obviously having a higher rated charger will heat the battery more, so make sure the phone has its back ventilated, and try avoiding direct sunlight.
Read of several people that had this issue, but got their phones charging when avoiding overheating it.
Sent from my GT-I9100 using XDA Premium App
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But that's a bit strange, because a charger should deliver what a phone is asking for. As far as I know, a charger doesn't push the charge to the phone. But we will see, if the phone does get overheated, then that will be the end of the charger.
malimal said:
Try the Rockfish premium charger. It's 2A and looks nice.
Sent from my GT-I9100 using XDA Premium App
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Do you have a link where it can be found?
mynameisjon said:
has anyone had any luck with the motorola charger? I bought one for my nexus one + car dock and it always worked fine... have yet to have a chance to use it for my SGS2 though..
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Which motorola charger?

Bart1981 said:
But that's a bit strange, because a charger should deliver what a phone is asking for. As far as I know, a charger doesn't push the charge to the phone. But we will see, if the phone does get overheated, then that will be the end of the charger.
Do you have a link where it can be found?
Which motorola charger?
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You're mistaken.
The thing that you plug into your car, that's called a power supply.
The real charger is built into the phone. That's the charging circuit that will shut down the charger, stop drawing power from the power supply when the phone gets too hot.
I doubt the phone will be able to take 2A, and the circuits will prevent the phone from drawing 2A of current.
#1. So, what you're looking for is actually a power supply that provides suficient current. Most car chargers will be about the same.
The power supply is connected to your phone via cables. Badly made cables will not be able to supply more than 200mah, and as a result you're going to take a really long time to charge your phone, and with a high drain application going on, you're not going to be able to charge your phone.
I had that exact same problem previously, and it was because of a lousy batch of oem cable I bought from ebay. Original, and other brands of oem cables worked fine.
#2. You need to buy some proper cables. I buy from www.monoprice.com, because I like my cables to be gold plated.
Edit: No, I'm not related to monoprice. I just love my gold cables plated heads. Can't find them cheaper anywhere else.

But the quality of the cable is not the only thing. The phone should also see the charger as an AC charger instead of an usb charger. This can be done by connecting the middle pins in the usb cable. Otherwise it will only charge with 500mA.

Bart1981 said:
Do you have a link where it can be found?
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i got mine off ebay, but its like this one below
http://www.bestbuy.com/site/Rocketfish%26%23153%3B+-+Premium+Micro+USB+Vehicle+Charger/1114106.p?id=1218221913668&skuId=1114106&st=Rocketfish%20Car%20Charger%20&cp=2&lp=1
make sure you get model RF-PMC55

Bart1981 said:
But the quality of the cable is not the only thing. The phone should also see the charger as an AC charger instead of an usb charger. This can be done by connecting the middle pins in the usb cable. Otherwise it will only charge with 500mA.
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Is there a car charger you can buy that does this automatically? (i.e phone thinks it's plugged into AC rather than USB). I'd rather not plug anything i've been messing about with into my beloved SII.

It's not about the charger but about the cable you're using.

Usb charger

I lost my usb charger and bought another one with a output of 2100 Ma. But he is charging only when the tab is off and only 60% of its capacity. Any ideas please
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Hmm, sounds like it doesnt keep up to its promisses. Did you measure it, if it realy puts out 2100 ?
I`d say it doesnt. My guess .....maybe 600-700.

If I ever lose my usb charger, I would simply get another original one from ebay to avoid any charging issue... just my 2 cents

USB Charger
If you can you should flash pershoots kernel, one of its many features is that it enables charging from any charger.

mexxdude said:
I lost my usb charger and bought another one with a output of 2100 Ma. But he is charging only when the tab is off and only 60% of its capacity. Any ideas please
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It's likely that your charger ISN'T delivery 2.1A as you need to turn the tablet off.
Second possibility is that the charger is detected as a USB port, I have tried a few chargers and some generic ones are having this issue even though the output current is larger than 1A.
However, allowing it to stand for another 6-8 hours should allow you to recharge the battery to full.

Or you can just go get a real Samsung one from Samsung themselves. I wouldn't trust 3rd party USB chargers. Batteries can get messed up with unknown makes.
Rather stick to original parts, it's not worth stuffing up your battery and having to spend even more money

InTents said:
Or you can just go get a real Samsung one from Samsung themselves. I wouldn't trust 3rd party USB chargers. Batteries can get messed up with unknown makes.
Rather stick to original parts, it's not worth stuffing up your battery and having to spend even more money
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Ditto...my thoughts exactly
Sent from my GT-P7510 using XDA Premium HD app

In trying to get a second charger for myself, I discovered that those chargers don't seem to be readily available at the regular sources, Bestbuy etc... I ended up getting the charger from a Verizon store for $25. It is a Verizon branded charger but it works perfectly.

What makes the Galaxy S4 USB cable different from Galaxy S3/S2/S USB cables?

When rooting the Galaxy S4 phone, it has been said on this forum that original USB cable must be used. I read people's posts where they said that Galaxy S3 cable did not work whereas using the S4 original cable that came with the phone worked.
I may have confirmed this the hard way when I also could not root the S4 until I used its original cable. The thing is, in addition to using the original USB cable, I also switched USB ports.
So is the cable itself different, or was it perhaps using a different port that made the difference?
I am not talking about low quality cables vs S4 cable, I am talking about genuine cables like the one that comes with S3, is there a difference between it and the S4 cable? I know the S4 charger is a 2 Amp charger, I know it's different and I am not talking about that, my question is about the cable itself.

No you dont need the original that is bs. I haven't used my original at all. I used the one from my S2 and S3 with no problem.
Sent from my SGH-M919 using Tapatalk 2

I have only used an amazon .99$ cable on all my phones. Never had a single problem. I leave the original cable and charger in the box.

Download "galaxy charging current lite"
Plug in each cable
You will see that different cables give you different voltages for charging. Ive only seen the highest (1900) with my original cable and that charges pretty quick. My s3 cable only charges at 1000 and my sisters crappy phone charger would only push 300 which is not enough to charge the battery.
Sent from my SGH-M919 using Tapatalk 2

Once again, multiple posts in Galaxy S4 threads mention to be SURE to use the original cable, especially when people have problems, and then they report problems resolved after using the original S4 cable that came with the phone. So several people that I've seen, including myself resolved problems after trying the original Galaxy S4 cable instead of the old ones, with one person specifically saying that even the Galaxy 3 cable did not work.
Judging by the post above, it is the cables themselves and not simply what they are plugged into (for example a new 2 amp power source vs older lower amp power sources or even different USB port).
So then the logical follow up question is HOW do you tell you are getting a cable that can match the original Galaxy S4 cable if nobody really lists the cable specs?

Thanks PostMeridianLyf for posting about that app. I just measured all the cables in the house. Some came in as low as 300, found three that came in at 1900, just like the original S4. I suppose the only way to tell is to test them after getting them. There should be an industry standard.

If you're going to charge the S4 overnight, is it actually preferable to use a 300 USB cord instead of the original 1900 cord because the charging would take (much) longer but would actually be easier on the battery life?

c627627 said:
If you're going to charge the S4 overnight, is it actually preferable to use a 300 USB cord instead of the original 1900 cord because the charging would take (much) longer but would actually be easier on the battery life?
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I wouldnt think so. If you keep refreshing it you will see that the phone is able to vary the charge and will slow or stop charging the battery when its full.
Besides, its the stock charger for a reason and batteries are not too expensivd either. Just my opinion though, and i dont even think 300 would be near enough
Sent from my SGH-M919 using Tapatalk 2

How cheap batteries are is not the point.
If you use a speed charger on regular batteries they will not last nearly as long as when you use a charger that takes several hours to fill them up.
After you go to bed, if you are looking at a few hours of sleep, then it doesn't matter how long the charge takes, doesn't it stand to reason that given a choice, we should choose the slower charging process and extend battery life?

Just try it. But i know for a fact 300 wont even keep your phone on.
Sent from my SGH-M919 using Tapatalk 2

c627627 said:
How cheap batteries are is not the point.
If you use a speed charger on regular batteries they will not last nearly as long as when you use a charger that takes several hours to fill them up.
After you go to bed, if you are looking at a few hours of sleep, then it doesn't matter how long the charge takes, doesn't it stand to reason that given a choice, we should choose the slower charging process and extend battery life?
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in theory and in a lab? yes it will extend the battery life by some statistically relevant amount.
in the real world? you would see a bigger impact from heat (like gaming, using the phone outdoors, etc) on the battery than a slower charging current.
Heat kills batteries, not a sub 1C charging rate.

I say BS! I have been using my old morotola razr v8 charging with all my phones ...
Sent from my SGH-M919

JUSMEJOSE said:
I say BS! I have been using my old morotola razr v8 charging with all my phones ...
Sent from my SGH-M919
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I don't know what "all" phones means but this is a Galaxy S4 forum and if you use the app posted earlier to measure an old cable, and it happens to be a low current cable, you will not be able to Odin to root the Galaxy S4.
My Galaxy S4 did connect to my computer but I was not able to successfully root using Odin UNTIL I used the original cable which the app measured at 1900 vs. other cables which ranged from 300 to 600 to 900 to 1100. The same was confirmed by multiple users on this forum. Whenever someone has problems rooting Galaxy 4 through Odin, one of the first questions asked now is 'which cable are you using?'
I measured some old cables to match the original Galaxy S4 cable, but there is no way to tell unless you use the new 2 amp Galaxy S4 charger to send the current through and measure each cable using this app: https://play.google.com/store/apps/details?id=com.abmantis.galaxychargingcurrent.free

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I know this is an old thread, but how are you guys measuring the charge current (not voltage as most people are referring to) on the s4?

This app measures it:
https://play.google.com/store/apps/details?id=com.abmantis.galaxychargingcurrent.free

no problem here ..I used older cable.. my sgs 4 cable is still in the box.. I rooted and flashed philz recovery withnokd cable fine. on 2 dif. m919 phones.
Sent from my SGS 4

I use my 8f cable that I got on newegg when I was rooting my nexus one and my touch 4g I still use it on my sgs4 never had problem with it didn't really test the with any app or voltage
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The main issue here that people are referring to is the pins on the cables. Certain manufacturers are known to use extra pins in the connectors. These serve a few purposes which I won't get into. You may notice on those cables only reaching 300 mAh that the data transfer is also slower. On the factory one, the data transfer will be quicker.
That's all there is to it. Your phone will root just fine. Now, sometimes a crappy charger will really screw with the phone and battery and the only way to "reset" it so it works fine is to use the factory charger. Like when your phone says it's charging even though it's not plugged in.
As far as "trickle charging" a Li-ion battery (ours is a lithium ion polymer battery I think) its worthless generally. Trickle charging is an old trick use on lead-acid and nickel-cadmium batteries. Li-ion works in a totally different way. No real point exists for using that method on these batteries. You might as well charge fast and use your phone than waste time at 300 mAh. Your battery has a chip in it that takes care of all the dirty work. It maintains the proper charging current and will top off the charge as needed while it's plugged in - which is what a trickle charge would do if done correctly.
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PostMeridianLyf said:
Download "galaxy charging current lite"
Plug in each cable
You will see that different cables give you different voltages for charging. Ive only seen the highest (1900) with my original cable and that charges pretty quick. My s3 cable only charges at 1000 and my sisters crappy phone charger would only push 300 which is not enough to charge the battery.
Sent from my SGH-M919 using Tapatalk 2
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Thanks for this app! Just tossed out a bunch of cheap-ass USB cables that couldn't deliver more than 300 mA.

HTC One Charger

Can anyone recommend a charger that actually works and charges the HTC One? I ordered an "OEM Charger" from Amazon and it did not work. Now after reading a bunch of reviews for whatever charger I find, people claim that those chargers dont work.

Evolancer13 said:
Can anyone recommend a charger that actually works and charges the HTC One? I ordered an "OEM Charger" from Amazon and it did not work. Now after reading a bunch of reviews for whatever charger I find, people claim that those chargers dont work.
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I have used multiple chargers that I had with Nokia devices and in car I three different "no name" chargers, all of them work as should. With one Nokia charger I get notification that tells that charging isn't that fast as it could with different charger.

I've used the chargers I had from my Samsung Epic. They work fine. Also, the iHome two port usb wall charger I got at Wal-Mart does great with one of the cables I still had laying around. Sometimes I use the charger at work that came with our Kyocera DirectConnect phones.
I think the key is just to make sure any charger you use is at least 1amp.
Sent from my HTCONE using xda app-developers app

I'd order a charger from ebay, and it takes about 6 hours to charge the phone.
Also, something is wrong because when I pick up the phone, I feel something weird on the speaker.
So I recommend to use the original one ! It takes less than 3 hours to charge the phone.

I use the one from my old s3. Actually charges faster than the original
Sent from my HTC One using xda app-developers app

Any wall charger with a 1A (Amp) output will be ideal for the One. A lot of the "rapid" chargers have about a 500 - 650mA (milliamp) output (about half of the power of the genuine charger). It won't do any damage if it's lower than 1A, but it will take a lot longer to charge it.
Don't be cheap on chargers though, the cheaper the charger, the more likely it will be to fail after a month, and potentially damage your charging port.

Thanks for the responses! I will look into chargers with 1.0 A charging, I have been using an LG charger that my dad had laying around.

I am no fan of verizion at all and didn't feel like driving to my local att store so..
I bought a 5v/2.1amp Verizon charger for 15$
6' long cord with an led light at the tip to help light up the usb port on the phone when trying to plug in. Also the base has an led light which lights up to let you know when the device is fully charged
Sent from my HTC One using xda premium

Johnny424 said:
I am no fan of verizion at all and didn't feel like driving to my local att store so..
I bought a 5v/2.1amp Verizon charger for 15$
6' long cord with an led light at the tip to help light up the usb port on the phone when trying to plug in. Also the base has an led light which lights up to let you know when the device is fully charged
Sent from my HTC One using xda premium
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I think using a >1 A charger may damage our batteries in the long run. I wouldn't recommend going beyond the 1 A of the stock charger.

raghav2511 said:
I think using a >1 A charger may damage our batteries in the long run. I wouldn't recommend going beyond the 1 A of the stock charger.
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False. Current is taken, not given, meaning the phone only pulls 1 amp from a 2A charger. I have verified this personally using Battery Monitor Widget. It displays the current charge/discharge current and reads 1A with my 2A charger.
I'm surprised so many people have problems with chargers. I have used Samsung, Asus, and some random Walmart chargers, and they all have worked at 1A. Maybe the people with problems are using really crappy or broken chargers?

I've been using an LG Charger, 4.8V and 1.0 A.
As far as i know, it doesn't really matter if its 1 or 2 amp, since its just the max output and it depends on the phone to use a certain ammount of amps. Voltage is what is important when it comes to providing a secure charging i think.

Charging The 10.1

I lost the original charger to my 10.1 2014 Edition and I've had problems ever since. Earlier this week I thought I would order a Limefuel 24W 4.8A dual port rapid charger. I thought to myself: Hey I can untick Power saving and have all my needed apps running. Even using a root mod to run 4 way multitasking. Yet it's still sucking up more juice than the charger is spitting out. Am I doing something wrong or did I get a faulty unit from China? This was NEVER a problem when using the Damn Samsung charger along with the foreign adapter dongle it shipped with. I thought getting one so powerful would charge it even faster.
Maybe I should just ship it back and get an official unit from Samsung? Although I don't see how getting less energy will make the tablet charge any better

thatblokematti said:
I lost the original charger to my 10.1 2014 Edition and I've had problems ever since. Earlier this week I thought I would order a Limefuel 24W 4.8A dual port rapid charger. I thought to myself: Hey I can untick Power saving and have all my needed apps running. Even using a root mod to run 4 way multitasking. Yet it's still sucking up more juice than the charger is spitting out. Am I doing something wrong or did I get a faulty unit from China? This was NEVER a problem when using the Damn Samsung charger along with the foreign adapter dongle it shipped with. I thought getting one so powerful would charge it even faster.
Maybe I should just ship it back and get an official unit from Samsung? Although I don't see how getting less energy will make the tablet charge any better
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4.8 amp should do the trick. Could be a fake unit. Is it heavy? 4.8 amp is pretty much, so it should be as big as a lap top charger.
But remember , a cheap usb cable may also be the problem. Try a short one of good quality.
Edit.Just tried a 1.2 amp Nexus 5 charger on my P605. Charging good on full brightness.
Thanks
KnieveI

KnieveI said:
4.8 amp should do the trick. Could be a fake unit. Is it heavy? 4.8 amp is pretty much, so it should be as big as a lap top charger.
But remember , a cheap usb cable may also be the problem. Try a short one of good quality.
Edit.Just tried a 1.2 amp Nexus 5 charger on my P605. Charging good on full brightness.
Thanks
KnieveI
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The charging circuitry and s/w on the device determine charging speed. Do a search. Someone posted the different charging amperages using the stock charge and Apple and HTC chargers and USB cables. The device detected the latter and charged at about half of the former.

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BarryH_GEG said:
The charging circuitry and s/w on the device determine charging speed. Do a search. Someone posted the different charging amperages using the stock charge and Apple and HTC chargers and USB cables. The device detected the latter and charged at about half of the former.
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Yes thats obvious and i doesnt even need to " do a search ".
The problem was it wouldnt charge at all.
Thanks
Knievel

Does the p600 also not charge correctly with a non samsung charger? I remember my p1000 requiring an adapter that had a resistor between two connections to charge correctly at a laptop or different charger.
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