Is it OK to charge my S3 using the USB port of my car? I'm not sure of the current rating of the USB port but if ever can it be lower than 500mA (standard current rating of USB 2.0) and have no problems with it? If it's less than 500mA, it will take longer to charge, I know, but is it safe?
kevindd992002 said:
Is it OK to charge my S3 using the USB port of my car? I'm not sure of the current rating of the USB port but if ever can it be lower than 500mA (standard current rating of USB 2.0) and have no problems with it? If it's less than 500mA, it will take longer to charge, I know, but is it safe?
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Click to collapse
Yes it is safe. By default that port will charge at 500mA
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prinzhernan said:
Yes it is safe. By default that port will charge at 500mA
Sent from my GT-I9300 using Tapatalk 2
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Right, thanks. Same rating with USB 2.0 ports in computers.
It might take you 8 hours or more before you have a fully charged phone but go ahead.. unless you boost your USB Charge rate by installing a custom kernel like Syiah
YoungAceAtlanta said:
It might take you 8 hours or more before you have a fully charged phone but go ahead.. unless you boost your USB Charge rate by installing a custom kernel like Syiah
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Click to collapse
Is that 8 hours approximate the same when charging through computer usb 2.0 ports?
What are the pros and cons of boosting usb charge rate by installing a custom kernel?
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The obvious con is that you may and probably will fry your Usb port on the computer.
To keep their stuff as cheap as possible, manufacturers have usually stopped using current-limiters in the usb ports. So if you drain more power than it was spec'ed for the weakest link will burn out eventually. (over-engineering is long gone in computer hardware)
However you won't often really charge that faster since you simply can't get any more...
Many built-in car chargers provide 1Amp power instead of 0.5
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d4fseeker said:
The obvious con is that you may and probably will fry your Usb port on the computer.
To keep their stuff as cheap as possible, manufacturers have usually stopped using current-limiters in the usb ports. So if you drain more power than it was spec'ed for the weakest link will burn out eventually. (over-engineering is long gone in computer hardware)
However you won't often really charge that faster since you simply can't get any more...
Many built-in car chargers provide 1Amp power instead of 0.5
Sent from my GT-I9300 using xda premium
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Click to collapse
You mean obvious con of boosting the USB charge rate?
Oh btw, I'm not using a car charger. Literally, my car has a USB port. Are you saying that USB port is rated at 1A?
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Related
Folks,
Using the Siyah kernal for a while now and its been amazing.. Well, I have seen an option under Stweaks to increase de amperes for USB charging..
Default is 475mAH which causes slow charging.. Is there any harm if this is increased and upto what level can we increase it?
I put it to 900 no harm to mention.
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gordonx10i said:
I put it to 900 no harm to mention.
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it may very well damage your usb port on a long run.
Recommended max power output of usb 2.0 is 500ma, (in gaming computer it may be more) on usb 3.0 its 1000ma .
So, determine which you have got. In laptop it will be even less...
If you are not using computer usb and other usb charger you can increase it but keep in mind charging in high amp. will shorten life of your battery too...
bala_gamer said:
it may very well damage your usb port on a long run.
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Click to collapse
Why using an ac charger dont damage the usb port?
USB & AC charge at same speed here... I've set USB @550mah & AC @750mah so i think there's a problem with STweaks (or what?!) :s
When you say usb port am I right in thinking you mean the computer and not the phone?
Usexy said:
When you say usb port am I right in thinking you mean the computer and not the phone?
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exactly
hi frens i have got s3 n in stweaks in ac current i set the value from default 1000ma to 1200ma.wil this gonna hurt my s3.coz its taking lon time for a full charge,so done this
pls reply whether its a danger
http://db.tt/kRJAl7Cl
Read that ... But basically anything under 1470 should be fine
No damage.
Sent from my GT-I9300 using xda premium
Just wondering what amperage people are getting. I get a max of 1.2a even though I have tried other chargers that put out more. Not sure if it's something with my phone or maybe the various chargers I've tried.....
Sent from my SCH-I545 using XDA Premium HD app
todd3835 said:
Just wondering what amperage people are getting. I get a max of 1.2a even though I have tried other chargers that put out more. Not sure if it's something with my phone or maybe the various chargers I've tried.....
Sent from my SCH-I545 using XDA Premium HD app
Click to expand...
Click to collapse
U using stock Samsung charger and cable?
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todd3835 said:
Just wondering what amperage people are getting. I get a max of 1.2a even though I have tried other chargers that put out more. Not sure if it's something with my phone or maybe the various chargers I've tried.....
Sent from my SCH-I545 using XDA Premium HD app
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Click to collapse
I've found the stock charger that came with my phone doesn't charge very fast anymore. It will sit around 1.2a but with a new charger with a rating output of 2a I've been getting a charging rate of about 1.9
Sent from my SCH-I545 using XDA Free mobile app
Not gonna lie I have been using the iPad charger with a stock cable and that will get it done quick. Try to back up an oem iPad block off amazon or what not and you will notice a difference.
todd3835 said:
Just wondering what amperage people are getting. I get a max of 1.2a even though I have tried other chargers that put out more. Not sure if it's something with my phone or maybe the various chargers I've tried.....
Sent from my SCH-I545 using XDA Premium HD app
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Click to collapse
Unless you are running a custom kernel with fast charge I think the phone will not charge at 1.9a unless the screen is off.
Sent from my 4.4.3 GPE'd vzw S4
znel52 said:
Unless you are running a custom kernel with fast charge I think the phone will not charge at 1.9a unless the screen is off.
Sent from my 4.4.3 GPE'd vzw S4
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Click to collapse
How do tell what amps it charges at? All I can find is what the voltage, using 3rd party apps from the play store of course. My phone charges incredibly slow. Especially if I'm using it during the charge cycle. Hours can go by and it just sits there at 5%.
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zombolt said:
How do tell what amps it charges at? All I can find is what the voltage, using 3rd party apps from the play store of course. My phone charges incredibly slow. Especially if I'm using it during the charge cycle. Hours can go by and it just sits there at 5%.
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Click to collapse
This is what I use: https://play.google.com/store/apps/details?id=com.abmantis.galaxychargingcurrent.free
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If you use KT kernel, it shows you in KTweaker the charging current.
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znel52 said:
Unless you are running a custom kernel with fast charge I think the phone will not charge at 1.9a unless the screen is off.
Sent from my 4.4.3 GPE'd vzw S4
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Click to collapse
I'm running ktoons kernel without fast charge, and I'm getting 1.9
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I'm on safe strap so running a custom Kernal isn't possible. I'm guessing I'm seeing the 1.9a when it's initially waking up from the screen off. I've tried the stock cable, as well as the Amazon one that is 1.9a.
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znel52 said:
Unless you are running a custom kernel with fast charge I think the phone will not charge at 1.9a unless the screen is off.
Sent from my 4.4.3 GPE'd vzw S4
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Click to collapse
The Fast Charge mode on the KT kernel has no impact on AC charge rate, it only affects USB charge rate:
Normally, when you connect to a PC, you get about a 500ma charge rate and the ability to pass data along. When 'Fast Charge' is set, you lose the ability to transfer data, but the 500ma restriction goes away. In practical terms, it means that you should see between 700ma and 900ma as a result.
w/respect to the OP, my experience is weird. When the device was new, I got around 1800ma on stock charger and cable; now, same setup gets me 900-1200 if lucky (even with new battery). When I tried the stock charger with a different (newer) cable, I get around 1600. It's strange that a cable's ability to carry a charge would degrade so quickly (if that's in fact what's happening).
I have no proof, but absolutely believe that kernel can influence max charge rate, because in the past, I've observed max charge rate drop with the release of a new kernel version, then go up again with another release.
Samsung did slow the charging rate in one of the OTAs. People had been complaining about the phones getting too hot.
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its weird for me, when i use my qi samsung galaxy charging pad(wireless charging) i get 1.9a, but when i plug the cord in to charge(wired), i get 460mA. wtf??
methodsofbeyond said:
its weird for me, when i use my qi samsung galaxy charging pad(wireless charging) i get 1.9a, but when i plug the cord in to charge(wired), i get 460mA. wtf??
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Click to collapse
What are you using to measure that? Qi isn't capable of charging at 1.9a
The galaxy charging current app..
So you've noticed that sometimes your phone seems to take forever to charge, and other times it seems to charge fine? Let me share some ideas that I've learned through lots of research on this exact subject last year...
I have used the galaxy charging app myself. In my opinion, CurrentWidget is better...looks cooler too. Ha.
So other than software related issues, you need to remember that the speed in which your phone charges is highly dependent on the hardware of 3 things:
1) Power Outlet (including power strips, extension cords, USB extenders, etc.)
2) Power Adapter (I highly recommend Anker's products!!!)
3) MicroUSB Charger Cable (if not using the factory Samsung cable or an Anker one, be sure that it's an 11-pin microUSB, and NOT a 5-pin...they look the same!)
Power Outlets - I know for me, if I use the outlet in my livingroom, it takes SO much longer for my phone to charge than it does in my bedroom. Just try this test! Grab that CurrentWidget app from above and try out some different outlets throughout your house, just to see whether or not the voltage varies. I bet you'll see that this is true!
Power Adapter - You should be using either the factory Samsung charger or a reputable 3rd party charger with the equivalent specifications (5V & 2.1A). However, I actually prefer my Anker charger over my Samsung one! If you're finding that you can't get a good charge, try swapping out your adapter with another one.
MicroUSB Charger Cable - As stated with the power adapter, you should also try to stick with your factory cable if possible. HOWEVER, I have found that to daily connecting and disconnecting of the cable with your phone, they probably receive the most wear and tear of anything else, and therefore may need replacement after some time. Again here, I find that using either my Anker cable or Samsung cable will give me the best charge. This is determined by both the CurrentWidget app and the amount of time it actually takes to get a full charge! Keep in mind that using USB extender cables can drastically lower the voltage to your phone - thus causing a very slow charge.
So basically, I know if I need to charge my phone as quickly as possible, I know I should clear my RAM and recent apps, put my phone on airplain mode, and using my Anker charger, I plug-in at the outlet near my closet door! I figured this all out by using these same ideas I just shared with you! Hope this is helpful!
If you can tell the difference between outlets, you need to call an electrician. Not kidding.
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brizey said:
If you can tell the difference between outlets, you need to call an electrician. Not kidding.
Sent from my SCH-I545 using Tapatalk
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I doubt that's entirely true. I mean, think of if they're on different circuits, that kind of thing can vary...also, depending on what you have plugged into your outlets can cause lower outputs I'd assume. I'd bet if you used the app I referred to and ran a test at each of your outlets, and reported back here (being honest of course), that you'd see some differences. Anyways, that was far from the point of the post. But thanks for the insight!
calebcabob said:
I doubt that's entirely true. I mean, think of if they're on different circuits, that kind of thing can vary...also, depending on what you have plugged into your outlets can cause lower outputs I'd assume. I'd bet if you used the app I referred to and ran a test at each of your outlets, and reported back here (being honest of course), that you'd see some differences. Anyways, that was far from the point of the post. But thanks for the insight!
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Click to collapse
The Samsung power supply is rated for 100 to 240 V @ 0.5 A input. It may be that the power supply is kind of crappy, and varies its output under small variations in input voltage, which is why you see what you see. It really shouldn't...but it wouldn't shock me if it did given that its made for $2 in China. Makes you wonder what would happen if you plugged it into a 240V source. When my wife went to Malaysia last summer to visit her folks, I just put a US to British transformer-less adapter on her Motorola brick and it worked OK plugged into 240V. Maybe the Samsung ones are crappier?
I squared R losses should be reasonably low in household wiring. NEC is 5% drop max at the outlet. And that is like the outlet the farthest from your mains under full rated load. Assuming you live somewhere typical, your voltage at the panel will be 120V+; a lot of time its a few volts over 120. If you have an outlet that is not tripping a breaker go below 100V, you have a problem somewhere. A 20% drop is not normal. Have you put a meter on the outlets with low charge rates?
My friend's OEM s4 charger charges at 1900 ma while my OEM charger only charges at max 1200... Weird how that happens but somehow the cable just stops charging as fast.
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My wireless charger takes alot longer to charger my device than my plug in charger.this isnt right is it?both chargers should charge my device at the same rate right? Thanks In advance!!!
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xda23 said:
My wireless charger takes alot longer to charger my device than my plug in charger.this isnt right is it?both chargers should charge my device at the same rate right? Thanks In advance!!!
Sent from my SM-G900T using XDA Free mobile app
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Click to collapse
I've never owned a wireless charger. But from what I saw from looking in the forum for my nexus 5. They take much longer to charger. In fact it goes usb 3.0 (fastest now) at like 1 1/2 hours or so, then micro USB at like (3 hours), then wireless charging supposed to take double the time of micro USB. It more for over night use not a quick charge. Hope it helps
Android6190 said:
I've never owned a wireless charger. But from what I saw from looking in the forum for my nexus 5. They take much longer to charger. In fact it goes usb 3.0 (fastest now) at like 1 1/2 hours or so, then micro USB at like (3 hours), then wireless charging supposed to take double the time of micro USB. It more for over night use not a quick charge. Hope it helps
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Thanks bud much appreciated.
Sent from my SM-G900T using XDA Free mobile app
With the included AC adapter, the S5 can charge at up to 2.1 amps or so. USB 3.0 maxes out at 1.0 amp, and wireless chargers are about 0.7 amp. The slowest is really USB 2.0, which is only like 0.45 amp.
Sent from my SM-G900T using XDA Premium 4 mobile app
..
fffft said:
A good and essentially correct summary. But there are exceptions and cavets.
While most USB 2 ports are rated at ~ 0.5A it varies and newer notebooks in particular may have USB 2 ports capable of 1A +.
Most AC adapters (aka travel adapters ) are typically, either 0.7 or 1A. But a decent full size AC adapter will be ~ 2A.
Also note that the phone will limit it's current draw when using a standard data cable so as not to overtax an USB port. To maintain a maximal charging rate when connected to a high capacity USB 2 port or USB jack on an AC adapter, a "charging" or power cable should be used. A charging cable has the two data lines shorted, to let the phone know that you are (ostensibly) connected to a high current source, rather than a standard USB 2 port.
And wireless chargers vary substantially in maximum output current from ~ 0.3 to ~ 0.9A. Most are also sensitive to ideal positioning. A randomly placed phone may charge at a substantially reduced rate, due to the reduced coupling efficiency of a random orientation.
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So if I plug my wireless charger into the white plug in adaptor that came on the charger that came with my Gs5 new that would give me maximum output voltage to my wireless charger?please correct me if Im wrong. Thanks In advance!!!
Sent from my SM-G900T using XDA Free mobile app
..
For the few days I've had my G5 I've noticed that this phone charges extremely slow when connected to a computers USB Port. Now I'm not stupid, and I realize that USB ports don't draw that much power at all. The reason Im concerned is that my old G2 on the exact same PC USB port probably charges almost twice as fast at least. Anyone know what might be going on? The cable should be fine, I'm using this: http://www.amazon.com/Cable-TechMatte-USB-C-Nexus-Black/dp/B01706YAXY . Thanks in advance.
Mine charged super slowly on USB as well, using the stock charger. I hadn't yet plugged it into the wall so I wasn't "used to" faster charging yet. That said I'd have to do a side-by-side with my G3 to really see.
panamaniac said:
Mine charged super slowly on USB as well, using the stock charger. I hadn't yet plugged it into the wall so I wasn't "used to" faster charging yet. That said I'd have to do a side-by-side with my G3 to really see.
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You mean the stock cable? This is just a problem with the pc usb port. Wall charging is fine.
UnderTheAir said:
You mean the stock cable? This is just a problem with the pc usb port. Wall charging is fine.
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Click to collapse
I mean the stock cable using a usb port on my macbook pro, yeah—same issue as yours, no?
panamaniac said:
I mean the stock cable using a usb port on my macbook pro, yeah—same issue as yours, no?
Click to expand...
Click to collapse
Yea was just a bit confused since you said stock "charger". Don't know why this is happening.
A quick google didn't reveal anything about QC 2.0 charging slower on computers than regular chargers. Since you have the stock cable too, have you compared those two to see if your amazon cable is the culprit?
UnderTheAir said:
For the few days I've had my G5 I've noticed that this phone charges extremely slow when connected to a computers USB Port. Now I'm not stupid, and I realize that USB ports don't draw that much power at all. The reason Im concerned is that my old G2 on the exact same PC USB port probably charges almost twice as fast at least. Anyone know what might be going on? The cable should be fine, I'm using this: http://www.amazon.com/Cable-TechMatte-USB-C-Nexus-Black/dp/B01706YAXY . Thanks in advance.
Click to expand...
Click to collapse
Can you download the app Ampre and tell me what the charge rate is? mine is fluctuating between 50mA to 740mA while plugged in to a SS (SuperSpeed) USB and max of 200mA while plugged into a regular USB. This a very good app to determine the quality of a wall charger. It will give you the Max USB current that the phone detects. I'm using original cord with phone.
Fadman37 said:
Can you download the app Ampre and tell me what the charge rate is? mine is fluctuating between 50mA to 740mA while plugged in to a SS (SuperSpeed) USB and max of 200mA while plugged into a regular USB. This a very good app to determine the quality of a wall charger. It will give you the Max USB current that the phone detects. I'm using original cord with phone.
Click to expand...
Click to collapse
Seems weird. Getting anywhere between 10mA and 210mA with a Max USB Current of 500mA.
UnderTheAir said:
Seems weird. Getting anywhere between 10mA and 210mA with a Max USB Current of 500mA.
Click to expand...
Click to collapse
I don't think its that wired if your plugged into a regular usb and not the superspeed USB.
Fadman37 said:
I don't think its that wired if your plugged into a regular usb and not the superspeed USB.
Click to expand...
Click to collapse
When I get home Ill Ampere my other phone too. And see what the difference is.
There probably isn't a problem at all. The reason it seems your G2 charged faster is because it's battery is smaller than the one in your G5.
Sent from my SM-G935T using Tapatalk
jrwingate6 said:
There probably isn't a problem at all. The reason it seems your G2 charged faster is because it's battery is smaller than the one in your G5.
Sent from my SM-G935T using Tapatalk
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Click to collapse
But it's not. The G2 had a 3000maH battery. The G5 has a 2800.
UnderTheAir said:
But it's not. The G2 had a 3000maH battery. The G5 has a 2800.
Click to expand...
Click to collapse
Wow....seriously? That's odd.
I charged mine for a bit today off a MacBook Pro (retina) and of course, it was slower than the wall charger and reported as charging "slowly" but the % it was increasing by was as I would expect and similar to that of the Nexus 5X. This was with the screen off. Did you have your screen on at all while charging? One thing I noticed with the 5X was that if you're using the phone or just have the screen on then the mA that the phone pulls from a computer USB massively dropped for some reason.
I guess the screen was on for some of the time. But there were whole hours where it wasn't. It think it was probably on plugged into the computer for like 3 hours, and got maybe 15% tops.
I used Ampere to check this against my G2 at home. Both were pulling the same amount, somewhere around 150-200 on average. Don't know, maybe its all in my head, but 3Hrs for 15% seems super slow even for a pc usb 2.0 port.
Yes that is normal
USB tops out at 500mah while 3.0 USB tops pit at 800mah I think
Could it be a false positive? You know that some devices report different charges... My old device had 100% show until it hit 95, then after it would stabilize. Charging could be the same. A lot of devices report charges at different rates at different parts of the battery... Regardless, usb charging has always been slow. It also depends if it's purely charging or also allowed to connect and sync. Then there is a difference as well... Many many factors to look into, honestly.
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Most laptops will only out out 0.5a per pair of ports. Desktop can put out more of course. Compare that to your included charger with 1.8a, or a normal 1a charger, big difference. And if you have the phone awake, it pretty much isn't going to go up lol
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For what it's worth my s7e charges very slow via usb to computer.
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Hello if anyone still has this phone do you have the same issue I got this phone last week (it does what I want and I am 12)it would not charge from a outlet but if I plug it in as a USB on my Wii it charges but it is so slow and I can't find a fix for it
Thanks
Sent from my Note i717 With XDA
Twitter @pekkatroop
This cable fixed it for me, buy a couple just in case the cable begins to fail (which they do). This cable increases in charge & charges to 100% fast while hitting the hotspot hard.
https://www.ebay.com/itm/Sync-Data-...e=STRK:MEBIDX:IT&_trksid=p2060353.m2749.l2649
Try this charger too, it's 2.5 Amps vs the stock 2.0 Amps Charger, so using the above Premium High Quality USB Cable & This charger will ensure very powerful charging rate.
https://www.ebay.com/itm/US-Stock-5...98:m:m-vXDI-B_PXXu2OQZM7dUTg&var=462200405483
chris1892006 said:
Try this charger too, it's 2.5 Amps vs the stock 2.0 Amps Charger, so using the above Premium High Quality USB Cable & This charger will ensure very powerful charging rate.
https://www.ebay.com/itm/US-Stock-5...98:m:m-vXDI-B_PXXu2OQZM7dUTg&var=462200405483
Click to expand...
Click to collapse
Thanks I will look at the chargers
Sent from my Note i717 With XDA
Twitter @pekkatroop