I have a dumb question about charging the battery... I'm not very familiar with Li-ion battery technology.
When charging over USB, the USB port can't provide enough amperage to charge the phone quickly. I had my phone plugged in for 3 hours and only got a 20% charge. My original Galaxy (Captivate) has a wall charger that provides 0.7A. The GS3's charger provides 1.0A. I know this phone will charge slower if I use my Captivates charger.
My question... I have a Transformer Prime, and that charger is rated at 1.2A. Will charging with a beefier charger cause any issues with the battery, including but not limited to life on a charge or life period? I can only assume it will get warmer when charging, since I'm pushing more current through it.
Would you charge the battery with a beefier charger? I'm hesitant, but I'm looking for your opinion.
Thanks, and sorry for the dumb question!
-Brian
I have the Transformer too and I interchangeably use the chargers and I have never had an issue on a phone regarding this issue.
However since I have never kept one phone for more than about 6 months I don't know about the long term effects.
I tried to charge my i9100 with an iPad charger once. It hit about 70% and about 120 degrees fahrenheit and then stopped charging. I would say be careful.
Related
Hey, i am trying to figure out what type of charger should i get for Vibrant GPS and accessories in my car. Ive read that using a normal charger such as 500mAH doesn't actually "charge". The Vibrant would actually use more than the charger could charge. I read in the other Galaxy S forum(i9000) that someone used a 2000mAh but never replied after that. Would going that high with a charger damage the battery?
I think you are good to go with a 1,000mAh. The 500mAh will charge a phone overnight without warming up the phone but its not enough juice if you are having the screen on, using GPS, etc.
The phone will only use what it needs to. 500ma is standard for USB, 1000ma is the norm for a wall charger. Its doubtful that the phone would use more than that, but nothing would be hurt by trying, as long as it is a 5V USB charger.
To expand on what Saiboogu wrote... the amperage rating of the charger is the capacity of the transformer -- how much it *can* supply, not how much it *will* supply. The phone decides how much juice to pull.
It's voltage that you have to be careful with. You want to buy a charger that outputs *only* 5 volts.
i'm reading different opinions about this when i searched through the xda forums and on google.
i'm using the same custom rom and kernel for about a week now. a few days ago, i charged purely on wall socket. left overnight, my battery lost only 2%.
last night, i charged my phone when it was about 30%. i charged using usb up to 85%, then i finished it off on AC up to a 100%. my overnight loss went up to 5% (i did not install any additional apk, or change my setcpu profiles, etc).
there are no topics on this, specifically for SGS2. mostly are from HTC threads.
from what i learned, usb's only pour out about half of what AC's can give (500 mah vs 1,000 mah). does that translate into a poorer batt life?
How you charge your phone, usb vs AC will not effect the battery life, 100% is 100%, it will just charge slower via usb.
Sent from my GT-I9100 using xda premium
I have noticed something similar with my captivate.I would guess that when you use the wall charger with 1amp the battery gets more of a charge than when you use a usb charger at .5amps. 1amp can cause more chemical change in the battery than half an amp.
sent from my Infuse at Tranquility Base.
SGS2 will only let 650mA into the battery, AFAIK it's hardware restricted to do this. Wall charger will charge faster, but only slightly.
I see no difference and 2% to 5% is within a tolerable variation of overnight drain .
Its all the same electricity .
jje
Sticks02 said:
SGS2 will only let 650mA into the battery, AFAIK it's hardware restricted to do this. Wall charger will charge faster, but only slightly.
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Firmware, actually, and the phone determines how much it will draw based on the resistance between the two USB data pins. If the resistance is < 200 ohms, it assumes it's plugged into an AC charger, and will draw up to 650 mA. Otherwise, it assumes it's plugged into a PC's USB 2.0 port, and will draw up to 450 mA, just under the 500 mA that a USB 2.0 port is supposed to provide, per the USB 2.0 spec.
Since it's firmware, it should be possible to change the current draw by re-compiling the kernel sources with new values. Note that you don't want to go too high on the charging current, as that could cause overheating or fire.
Sticks02 said:
SGS2 will only let 650mA into the battery, AFAIK it's hardware restricted to do this. Wall charger will charge faster, but only slightly.
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And how about charging a spare battery using a separate battery charger?
I have two batteries and I never charge them plugging the phone, just using a spare battery charger. Does it have any negative effect on the batteries' lifespan?
dont know what happened but my phone is being charged with ac adapter as same speed as usb.(more than 4 hours) :S
I have a USB charger capable of delivering 1A.
Even with the data pins shorted (phone side), it still seems to draw only 350 mA :-(
Any ideas?
Known made-up cables that do work?
I've just started using my S3 in my car connected to a car charger and have started noticing it gives the phone a super charge which means that I still have about 80% battery after about 6 hours use, this compared to around 50% battery if I was just to use my normal charger.
However my normal charger has a splitter cable on it which also charges my spare battery which is in a Samsung desk stand (sold as a Extra battery kit). It got me thinking can chargers give a different level of charge to a battery, even though they still 100% charge it?
Zammo76 said:
I've just started using my S3 in my car connected to a car charger and have started noticing it gives the phone a super charge which means that I still have about 80% battery after about 6 hours use, this compared to around 50% battery if I was just to use my normal charger.
However my normal charger has a splitter cable on it which also charges my spare battery which is in a Samsung desk stand (sold as a Extra battery kit). It got me thinking can chargers give a different level of charge to a battery, even though they still 100% charge it?
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Yes, several custom kernels have settings to adjust mains and usb charging currents
so, isn't it clear that questions go in the questions section?
I wasn't to sure if the post was going to include a question before I posted it, but if its a problem delete it or whatever I'm not really bothered.
Hi all,
When I use the charger that came with the HTC One my phone charges great, rapid.
But when I use any other charger that I have in my home/office it charges very slow. Even with a 2.1 amp charger!
The charger that comes with the phone has an output of 1 amp.
I've tried multiple other chargers (1 amp and 2.1 amp) and they all trickle charge.
Anyone else noticing this?
Thanks
Joe
I'm using old charges at home and in the office and it did seems slow but had not heard of rapid charge. Will the phone indicate this rapid charge mode? If not, is it real?
I'm getting slow charging even on the stock HTC charger. Not sure how I can enable this rapid charge cause 4+ hours from 0-1% to full is a bit ridiculous.
use orginal charger is best , maybe it has some relationship with your battery life
If anyone is coming from phones with smaller batteries, remember the larger the capacity the long it takes to charge.
I use the cable and charger from my Nexus 7 and it charges fast. Off my USB it is slow.
Real AC chargers have two pins shorted. You can hack a USB to micro USB cable and short the same two pins to enable AC charging with any adapter, wall, USB, or car. Should be pins 3+4, but don't hold me to that.
Sent from my HTC One using xda app-developers app
flooty333 said:
Hi all,
When I use the charger that came with the HTC One my phone charges great, rapid.
But when I use any other charger that I have in my home/office it charges very slow. Even with a 2.1 amp charger!
The charger that comes with the phone has an output of 1 amp.
I've tried multiple other chargers (1 amp and 2.1 amp) and they all trickle charge.
Anyone else noticing this?
Thanks
Joe
Click to expand...
Click to collapse
Try to change your phone
c5satellite2 said:
Real AC chargers have two pins shorted. You can hack a USB to micro USB cable and short the same two pins to enable AC charging with any adapter, wall, USB, or car. Should be pins 3+4, but don't hold me to that.
Sent from my HTC One using xda app-developers app
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i've done exactly this, and damned if the One still refuses to draw more than ~500 ma off of anything but the 2.1 A wallwart it came with (i don't have any others to try with). i'm about to dig out an old inverter to see if that will actually work. wish i'd paid more attention to my EE dad when i lived at home; i've gotten a serious crash course in this stuff while trying to get my One to charge in my car, when it's on.
edit: so i got my old inverter out, and spent about 15 minutes testing. i used the 2.0A adapter that came with my Nexus 7 to test, as well as the 3.1A Mediabridge adapter i got here. my phone was at about 45% when i started testing. unplugged, Battery Monitor Widget reported a drain of anywhere between 500ma and 650ma (running Ingress, wifi on). plugged in to the Mediabridge adapter showed, at best, a drain of 50ma. the Nexus adapter plugged in to my inverter charged at a fairly consistent ~120ma. i didn't touch my phone the entire time.
i left my Nexus 7 at work so i can't use it to repeat the test, but i will do so tomorrow. the cable i'm using is this one. i'm not crazy about having a ridiculous DC-AC inverter in my car for my phone, but if that's what i have to do so it can be used and not drain, then so be it. admittedly, i don't really understand these things enough to explain these variations, but i plan on learning ASAP. perhaps somebody else can shed some light on why the device charges different, and how it identifies an AC-USB adapter vs a DC-USB adapter.
sluflyer06 said:
If anyone is coming from phones with smaller batteries, remember the larger the capacity the long it takes to charge.
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Math doesn't support what is happening though. Phone has a 2300mAh battery. The OEM charger outputs 1A (1000mAh)
At most, it should be around 3 hours for full charge, when in fact it is closer to 4-4.5 hours. It's the last 10% that is the issue, it will trickle charge to 100% rather than rapid charge.
nest75068 said:
Math doesn't support what is happening though. Phone has a 2300mAh battery. The OEM charger outputs 1A (1000mAh)
At most, it should be around 3 hours for full charge, when in fact it is closer to 4-4.5 hours. It's the last 10% that is the issue, it will trickle charge to 100% rather than rapid charge.
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Yes, I think that's exactly what the HTC does... I read a pretty good article recently about Li-Ion batteries that talks about how trickle charging is the best for battery life, and it wouldn't surprise me if HTC got a little aggressive the way the this phone charges since we can't swap the battery ourselves.
I'm trying one last car charger, which matches the wattage of my Nexus 7's 5Vdc/2A AC adapter (which I've had the best luck with, when charging the phone while in use): http://www.amazon.com/gp/product/B009TBF7IG/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1
If that doesn't work, I'm going to put a 300W inverter in my car with the AC adapters themselves and stop buying stinking DC adapters. This phone clearly pays very close attention to the wattage available from whatever it's plugged in to.
veener79 said:
I use the cable and charger from my Nexus 7 and it charges fast. Off my USB it is slow.
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Same here, 2a Nexus 7 brick with a long Logitech USB cable, much faster than stock (and longer)
Harbinger1080 said:
Yes, I think that's exactly what the HTC does... I read a pretty good article recently about Li-Ion batteries that talks about how trickle charging is the best for battery life, and it wouldn't surprise me if HTC got a little aggressive the way the this phone charges since we can't swap the battery ourselves.
I'm trying one last car charger, which matches the wattage of my Nexus 7's 5Vdc/2A AC adapter (which I've had the best luck with, when charging the phone while in use): http://www.amazon.com/gp/product/B009TBF7IG/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1
If that doesn't work, I'm going to put a 300W inverter in my car with the AC adapters themselves and stop buying stinking DC adapters. This phone clearly pays very close attention to the wattage available from whatever it's plugged in to.
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I'm fortunate my car has a built in inverter that I use for charging my phone.
nest75068 said:
I'm fortunate my car has a built in inverter that I use for charging my phone.
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My next car will too, because I can only imagine that power requirements for these devices is going to increase.
That said, I think I have a winner, and instead of retyping my posts, I'll just link to that thread instead: http://forum.xda-developers.com/showpost.php?p=41797839&postcount=6
Since the snap Dragon 600 has fast charging capabilities, why didn't HTC Include it in the kernel??? I've noticed my 2500 mAh note battery charges faster than my 2300 MAH HTC one
Sent from the Sexiest Android Device (HTC One)
is there any tw 4.4.2 kernel with fast charge ? my note 3 is charging very slow from usb ( dont want to bring the wall charger everywhere i go )
Sent from my SM-N900P using Tapatalk 4
inst1029 said:
is there any tw 4.4.2 kernel with fast charge ? my note 3 is charging very slow from usb ( dont want to bring the wall charger everywhere i go )
Sent from my SM-N900P using Tapatalk 4
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Correct me if I'm wrong but I didn't know fast charge was Kernel specific. Thought it had to do with the cable and plug in?
Any-ways, my two cents are no there is NOT.
With the fast charge app that looks like a battery it is kernel spefic. When u run the application it will either work or say kernel is not supported
The output of a typical computer USB port is a half an amp at five volts DC. If you get a charger, wall or cigarette plug, that is meant for an iPad, it will output 2.1 amps at five volts. It's best, for the battery life and phone, if you don't use a modded kernel for fast charging. Batteries last longer, overall life before replacing them, if they are slow charged. Heat from rapid charging will reduce the overall lifespan of a battery. I'm talking tech like in one hour or less chargers for AA batteries but it still holds true for lithium ion. Heat and hitting a battery hard with an aggressive charging circuit will kill a battery faster. My suggestion is to use a charger that has a max output of 2.1amps, like used with the stock and iPad chargers, to recharge the battery if you're impatient. Better yet, get an official Samsung external charger with battery so you can rotate batteries and have one charging or charged without forcing yourself to have the phone tethered to a charger often. There have been high profile instances where extended capacity batteries have burned up a phone, when charging, because the electronics of the battery were crap or the cells were of crappy quality. Be safe, be smart. Samsung OEM batteries might be expensive and low run time, but they won't usually cause a phone to go into meltdown mode because of their subpar electronics or cells.