This question has been asked before but no one can answer it odd.
Nexus 7 charger is two amps. Stock s3 charger is one amp.
Can I charge my s3 without damaging it using the other charger. People say it charges faster. Some people say it doesn't matter because the kernel will limit it.
Whats the real deal?
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I am pretty sure it will use only what it needs. Atleast thats what i been taught at radioshack
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There are a lot of variables as to what the maximum charge current will be. I've never seen it go over .8 amp. So if you use a 1 amp, or a 20 amp charger, it will be .8 amp. MAX. Usually less.
Use whatever you have handy that is 5 volts.
I actually use an old 5 volt .6 amp charger for overnight charging. A bit slow, but I don't care.
I have a home grown charger on my motorcycle that can go well over 1 amp, but the phone only has ever gone to about .8 amp. For a long time I had that charger set to 5.5 volts, and the current was up a bit closer to 1 amp. But the heat worried me and I bumped it back down to 5 volts.
Have been charging my s3 on the new iPad charger, and 2amp chargers bought from amazon without any issues.
Sent from a SYNERGIZED GalaxySIII
I'm using a RCA dual usb charger one usb plug is 1 amp and the other is 2.1amp both charge fine but I don't notice the 2.1amp charging any faster. I so kinda point less to use in my eyes
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epagib said:
Have been charging my s3 on the new iPad charger, and 2amp chargers bought from amazon without any issues.
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You realize you're using a 10v charger on a 5v device right? That can toast your battery over time, a short time too depending on if you leave it plugged into it over night, etc..
Related
I purchased the Mediabridge high output USB car charger from Amazon and shorted the 2 middle pins for AC charging. Prior to the mod it was charging at like 405mA, after the mod I'm at about 907mA. Does that sound about right? For some reason I thought it would be a little higher. Those of you that have done this mod, are you getting higher than 907mA?
Bronk93 said:
I purchased the Mediabridge high output USB car charger from Amazon and shorted the 2 middle pins for AC charging. Prior to the mod it was charging at like 405mA, after the mod I'm at about 907mA. Does that sound about right? For some reason I thought it would be a little higher. Those of you that have done this mod, are you getting higher than 907mA?
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According to the original hardware mod they were getting around 800 mA so you have 907 is actually better not to mention in all depends of the charger etc
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Cool thanks for the info. Tested it out his morning and in a 30 minute commute to class the battery went from 44% to 80% so it seems to be working quite well.
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The max I've seen on any charger is around 905mAh, so yeah, that sounds about right. I think there must be a current limiter internally, as I've used a 2mAh charger and it still only charges at 905-ish.
Out of the blue I noticed my S3 was charging very slowly, it even was losing a charge while it was plugged in while I was using it. I figure it had something to do with my custom ROM so I reflash, still same outcome. The battery was still holding a good charge, so I figured it was something else. I then went out and bought a new charger, which came with a micro usb cord to see if that helped. Plugged in the new charger while using my old micro usb cord, still same outcome. Then used the new micro usb cord and old charger, charging went back to normal, problem solved! I would of never thought that the cord would malfunction from day to day use after such a short lifespan. Moral of the story, check your cords if you experience the same problem, it could save you some time and money!
I bought some cheap ones off Amazon. They won't charge the s3 but will my touchpad. But my s3 charger won't charge my touchpad. Stuff is weird at times.
Glad it was an easy fix.
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Must have been charging in USB mode.
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I believe it, using my old galaxy nexus cord for my s3 charges extremely slow (like 200 mAh) for some reason. I switched to a different cord and now it's all good, I have no clue why but that's how it is.
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That's weird mine started doing the same thing just in the past few days. I have to unplug and plug it back in multiple times before it goes into AC mode
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I really think that those cheap cables don't charge nearly as fast. Especially the Stock Sammy ones. I use the thicker LG cables and they seem to charge so much fast and transfer files faster..
I just went through the same thing. The phone was charging for twelve hours and only gained 50 percent. Took forever to figure out it was the cord.
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USB Cable
I think charging AC is not fast charge.
You should to charge USB cable.
Thanks.
cell128 said:
That's weird mine started doing the same thing just in the past few days. I have to unplug and plug it back in multiple times before it goes into AC mode
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That's what my phone was doing, I'd unplug then plug it back in and would go from USB to AC, but it still charged slow. That cable, no matter what it said, would still charge slow as balls.
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I had heard of "Buy Cheap, Buy Twice", but now we've got "Buy Cheap, Charge Twice"
A lot of times it's the DC power brick that makes the difference. Not all of them have the same power output. Rarely, if ever, is it the actual cord itself. USB cables use pretty thin gauge wire already and the only way you're going to get a difference from one cable to another would be if it was REALLY cheap and using an ultra-thin wire or if it was a REALLY long cable (increases in cable length equate to increased resistance to electrical transmission...)
All USB cables are 5 volts. However, there can be significant differences in the milliamp output for each DC adapter. Aside from being a computer geek and gamer who builds custom PC's, I happen to be a hotel General Manager. I just checked our catch-all box of phone chargers and found that while every charger has an output of 5v, the amperage put out varied from 350 mA to 1000 mA from one charger to the next.
This variance in output is why some chargers take so long as compared to others. I don't know what the actual Samsung charger output is, since my charger is at home, but my guess is it's between 800 and 1000 mA.
I use the stock BB charger to charge both my 9900 and GS3, the BB charges pretty normal but lately I've been having a problem with the charging time on my S3, I have to charge it everyday now, my usage isn't that heavy, it lasts me a day and a half normally. Going to start using the stock charger to see if there is a difference.
I'm using the Samsung stock charger after not having used it for a month and noticing that my battery levels have deteriorated after using my BB stock charger. The battery seems to be discharging while on the charger! I'm in for a world of pain, going to monitor it for a while. I could be stressing over nothing.
http://www.ebay.com/itm/3-1A-Dual-U...S_Cell_Phone_PDA_Chargers&hash=item565a917530
hello
My stock charger is us for galaxy s4 (samsung regular charger)
and then I found this (link above) with 2.1A
is it matter charging via 2.1A and not 2A? what is the different? it will charge faster/slower?
thanks
In Stock kernel there is current limit 1.9A. So everything above it, will be the same as 1.9A.
In reality, you will find that even 2.1A charger doesn't supply even 1.9A. Chinese charges definitely don't supply current thay claim. And beware of them - you may fry your device by such cheap charger.
Also, it heavily depends on USB cable as well. It has to be very short and very thick.
I have a Mediabridge car adapter that has a 2.1 amp charger on it. When I charge my S4 with it it barely charges faster than the 1 amp charger does. I think it charges at either 1.3 or 1.7 amps, sorry can't remember exactly.
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jev3gs said:
I have a Mediabridge car adapter that has a 2.1 amp charger on it. When I charge my S4 with it it barely charges faster than the 1 amp charger does. I think it charges at either 1.3 or 1.7 amps, sorry can't remember exactly.
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How do you measure the exact amperage that it charges at?
Badelhas said:
How do you measure the exact amperage that it charges at?
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I don't have the equipment to measure it exactly. So what I did was charge my phone from 50% for 40 minutes on my stock Samsung wall charger and then recorder the percentage it increased. I then took that number and assumed it was charging at 2 amps and used it as a baseline. Then I did the same test with my car adapter and recorded the results. The I figured out the percentage difference and came up with me estimates. I just don't have the data in front of me anymore but I remembered it being somewhere between 1.3 or 1.7.
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The stock charger is fast at charging this phone. On my s3 it took forever . I would stick with stock
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ok thanks
more people?
ok thanks
more people?
Chargers, power supplies, etc, don't "decide" the amps that go to a device - the device "draws" a certain amount. Just because a lamp is plugged into a 20amp circuit in your home doesn't mean 20 amps are going to be shoved through the bulb.
So if, as sorg says, the phone is only going to "ask" for 1.9a, you could plug it into a 5 amp charger and it would make no difference.
darixtorento said:
ok thanks
more people?
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You already got your answer above.
No, your phone will NEVER charge faster than 1900 until a developer comes along and figures out how to hack the system to allow this. And it would be a potentiallly STUPID idea to charge faster than Samsung has deemed safe.
Go here to find out how to test your charging rate:
http://forum.xda-developers.com/showthread.php?p=46156385#post46156385
I bought a dual usb car charger from eBay that is supposed to output 5v 2A on one socket and 5v 1a on the other, but while leaving it like that in my car it still drains the nexus 5. Tried to only have the nexus 5 connected to the 2A socket aswell but still discharges over time.
What can be the issue here?
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Probably either a bad USB cable(s) or chargers that are not putting out the amperage as advertised. There are a couple posts you can find in the accessories forum that show the effect of low vs high quality USB cables. Summary: there is a big difference.
I've personally been on the hunt for good cables and charges for a while and recently bought a car charger that charges while I listen to music and use Waze while driving. Very happy now, we'll I am, my wallet isn't.
Try current widget while hooked up to the charger. You can test how many amps you are drawing.
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It may be like the post above, drawing USB charge. I think I read somewhere there is a mod to enable fast charge.
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Tried some different cables in the truck now at lunch, the ones I used before got minus even while charging, these were cheap flat cables from China, tested with an Asus one i had laying around and that gave me ~700+ mah. So from -70mah to +700mah is quite the difference just by switching cables.
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Plugged my phone into a 2.0 charger from either b my s4 mini or my n3 before going to bed, woke up and phone wasnt fully charged. Didn't think anything of it, just went on my way. Now my phone just died completely went to use that same charger and didn't charge.
Downloaded a galaxy battery current charging app and it shows negative amperage when plugged into 2a charger. Also with the screen off it only shows one green dot instead of the trail leading to the battery.
Sounds like your 2 amp cable was defective. I've plugged mine into a 2 amp and it just takes a lot longer to charge
I thought so too, so I used the brand new cable that came with the n5, same result.
If the other cable was defective it could of damaged your usb port possibly. I use a 2 amp in my car sometimes then my 5 amp at home no ill effects
I use my note 3 charger every night because ive always heard a slower charge is better for battery longevity. I have had absolutely no problems and wake up with a full charge after a average 5 hour sleep every morning. I only use my note 5 charger for quick fill ups during the day. Im guessing your wall wart is bad. Try the 2amp cable on the note 5 charger then U will know its not the cable
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Same, no problems with the 2 amp here.
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