...
I have actually noticed my car charger heating up my phone more than my AC charger at home, but that might be because in my car I am usually talking or streaming music at the same time.
I think you noticing the charge stay at 100% longer from a usb charger might be just a placebo effect tho. This article gives a little insight of why you might notice your battery drop from 100% quicker than you would expect.
its been commonly said that slow charging prolongs overall battery life, and that it also lets the battery hold a stronger charge by slow charging it rather than fast charging it.
AC wall charger is 1 amp, USB is 0.5 amp, so USB always takes longer because its a slower charge.
i've been wanting to do this test too, maybe i'll give it a shot.
Related
Alright, so I have a mini USB car charger that is rated at 2.0A (got with GPS) and I just want to make sure the extra amperage is not going to charge my battery too quickly and then kill it in the process. All I have to go on is that my wall charger is capable of only 1.0A and the computer USB is on the level of mA. Does anybody have a car charger or know the maximum amperage possible that these phones can take?
Thanks in advance.
Its to Strong ! I have Crash a PDA with 1.5A
I've used a 2.0a charger but noticed that the battery didn't charge right.
On that note, also noticed that a .5a or 500mA charger after about 6 months killed my battery. (burned out and won't take a full charge anymore)
Recommendation is to stick to 1.0A charging as much as possible as the Wizard's charge circuit is designed at 1.0A charging and monitoring.
DOESN'T MATTER ..if u know the basic Ohms Law..its the max capacity of the charger.(or any source) the current regulating circuits will take care of the real charging current fed to the battery
I charge my phone on my computers USB connection all the time, all computers have a maximum of 500mA USB current.
Amps are pulled from the charger, not pushed to the phone.
Voltages are pushed to the phone, not pulled from the charger.
If the phone draws too much current from the charger, the voltage drops to a point where the maximum power (P (Watt) = U (Voltage) * I (Amps)) of the charger isn't exceeded.
According to the USB specification you need at least 200mA with 500mA recommended +5VDC.
More is never a problem, you could even use a 50A power supply without breaking your phone. Practically spoken: I wouldn't do that.
huh?
I have messed up a few devices before by putting the wrong charger on the device (2.0 amp charger on a droid eris and 1amp charger on the MOTOACTV) Is this a problem with the device's charging circuit? In general it should only pull up what it needs to charge but my devices were messed up?
I returned the first MOTOACTV after it wouldn't leave the boot screen and the second one I got acted funny on 1 amps as well. It charged fine on .75amp charger that came with the device but when I put it on my HTC Dinc charger it shot up from 10% to 20 to 30 etc. all within minutes. Hope I didn't mess this one up too.
Just trying to figure out what the deal is. My phone for sure charges faster when connected to 1amp vs .5amp (computer). This makes sense I understand because the device is able to handle 1amp, but I wonder if it would mess up with a 2amp charger.
Thanks!
The last two posts of 2008 are correct. Your phone is capable of drawing more than 500 mA but less than 1000 mA. If the charger is 1A, 1.5A, 2A, or 50A, it won't make a difference to the phone's charging time or life.
Wrong voltage can be bad, but phones are designed to support USB charging, as a minimum, and 1A to 2A is always safe. As was said in 2008, the charger pushes voltage to the battery, but the battery pulls current from the charger.
That's a really good way of describing it
Pushing and pulling current and voltage is a really good way of describing it.. Given that I am theoretically well within the charging parameters, how comes my phone (Galaxy mini/pop) becomes unusable when its charging (touch screen doesnt touch and screen jumps to new screen without touching?) Am I wrecking my phone?
No, your charger is to blame. Maybe it isn't properly grounded. Phones with capacitive touch screens (not the Wizard! but maybe your phone) can get really weird on some chargers. I have a Nexus One with an aftermarket charger that always makes the touch screen go haywire. When I use an HTC charger, the phone has no problem. As far as I know, the damage isn't permanent, it's just that the sensors get confused. When I disconnect from the charger, turn the phone off, then turn it on, all is well.
My wizards were never bothered by chargers, no matter what kind, as long as they were mini-USB, they were the right voltage. The wizard doesn't take as much current as more modern phones, either.
Hmm. Not properly grounded sounds very plausible. Viva mediterranean circuits. Thanks
Usb chargers will be rated at 5v, which is exactly the correct voltage to charge your device. What you want to make sure is you buy the correct "rated" amperage. Not because it will damage your phone. Amperage only exists as a sum of the power used by the device. You want to find a decent 1amp (1000mA) or higher if you wish, rated usb charger. The the mains charger for your phone is only rated at 1amp, so a 1amp charger is adequate. Avoid 500ma chargers as it will take twice as long to charge and gps / satnav applications will drain the battery even when charging at that rate.
Also if you have a new pc, most of the decent boards will specify 1amp charge even when off if it has on/off charge stated on manufacture details.
Newer phones will charge fine with higher amperage
The myth that charging your device at a faster rate will reduce the life of your device’s battery is false!
If you want quicker charging, look for a wall or car charger that delivers 2100 mA of current at 5 volts higher won't matter.... These lithium ion batteries can handle it... It was just back then if you were to try to put a faster charger in an older battery it (in any cases) just won't charge.
Guys, I know this has been discussed before but this problem is subtly different to previous requests so I'm posting again.
So this is an X10 running 2.1
I have a car charger which is a 2.1amp ipad charger. I also have a 1amp standard car charger. I do not have an SE branded car adapter, but both of the above adapters trigger the charging on correctly as far as i am aware.
If I just leave the phone on charge with the screen off it charges up just fine.
If I leave the screen on with no apps running it charges fine (slower than above)
If I run Copilot with APN Data enabled the battery slowly discharges, even though the charge light is on, and the battery indicator indicates charging.
If I run Copilot and disable APN Data the battery just stays at the same level and neither charges nor discharges. It seems to meet a state of equilibrium.
I ran Copilot with APN enabled and SetCPU limiting the CPU to 225MHz and the battery still discharges (albeit at a slower rate than without SetCPU).
I have the phone screen on minimum brightness and I am not running anything else unnecessary. I have checked battery temperature and I have never seen it above 32 degrees.
The same applies for Google navigation instead of copilot. Both discharge the battery whilst on charge.
I also noticed the other day that something went a bit mental on the phone and was consuming high CPU while the phone was on my branded SE AC wall charger and the battery ran down until the phone turned itself off whilst on charge.
So, does anyone else experience the fact that the phone does not draw enough power via the USB port to cover the current draw on the battery. I have 2.1 amps available on the car adapter and its clearly not drawing anywhere near that. Running it on the 1 amp charger also makes no difference. The SE branded AC adapter is rated at 750mA.
Is this normal?
Any clues?
At the moment to complete a 6 hour journey in the car using satnav on my X10 I have to take 2 or 3 fully charged batteries with me, in addition to having it on the charger.
Graham
The stock charger from Samsung was for 0.7Amps and it charges ok, but I find it slow.. about ~4 hours to fully change my SGS2 from with less than 10% left of battery life.
If I plug into the laptop, it takes like ~6 hours due to the slow trickle charge with 0.5Amps.
I don't know what the max pull is allowed on this phone, but I did find that when I charge with a 1Amps charger, I can get it from less than 10% to full in about ~3hours.
So, I tried a few such charges and have noticed some strangeness.. (all with the same test conditions, start charging with less than 10% and with the stock usb cable for the phone)
1) older Belink ac-usb 1Amps out put, it does seem to charge the phone good and faster finishing around ~3 hours ... but, when charging, the touch sensitivity of the screen is out of whack, any subtle movement, will cause the screen to jump around.. like in gallery, trying to select an individual pic is difficult as the screen jumps around; forget about using the browser and selecting links...not sure why..
2) HTC thunderbolt charger 1Amps output (http://www.amazon.com/gp/product/B003WM6SOU).. same issue here, charges faster, but makes the screen jump around
3) iPhone charger 1Amps output; this seems to work the best for me so far.. charges faster ~3hours and while charging the screen behaves normally, I am able to use gallery and browser fine...
4) iPad 2 charger 5.1 V and 2.1Amps: Still charges the phone ~3 hours, but same side effect...
Anyone else have the screen sensitivity issue and what chargers are you using?
I haven't seen any issue when I used a HP TouchPad Charger rated at 2.0A I think..
Max pull is 650 mA - this is set by the charger chip itself.
If the phone thinks you have a normal USB connection to PC instead of a dumb charger, it will be 400 mA.
Having a charger rated more than this won't hurt, but it won't help.
Monoprice "1A" car chargers are rated 300-400 mA at best - the ONLY monoprice product I've ever been unhappy with in my life.
In general, you want to make sure USB D+ and D- are shorted together by the charger - this guarantees that the phone sees the charger as "dumb" and goes to 650. Exception are media and car docks - whatever you connect to these will be assumed by the phone to be a high current "dumb charger".
All phone power usage (CPU, screen, etc.) counts against this current budget - e.g. if you have 200 mA of load, only 450 will be going into the battery.
Unlike the I9100, we don't appear to have any way to change these charging currents. Our phone, for whatever reason, has an additional chip for charge control (MAX8922) instead of using the charge control built into the main power management chip (MAX8997). This is disappointing, I was really hoping to bring over the "charginghacks" modifications from my Infuse kernel series.
my SGSII takes about 3 hours to fully charge. in japan, we had charging stations, where youd place a battery in a machine, and itd charge it from 10% - 70% in about 8 minutes,. and to 90% in about 15. this was because the machines used a higher current.
ive noticed the stock usb charger that comes with the S2 is a lower voltage of those compared to HTC, or say one youd buy at radio shack. yet even with a higher voltage charger, the phone still charges at the same rate. this is because the kernel controls input levels. the input levels are set to slowly take in a current, there are many reason youd want to have a slower charge.
one is to reduce salt bridge deterioration, which is ware on the battery. while this may be an issue for some who plan on keeping their phone battery for years, without upgrading their phone, or battery, for most of us a year of ware wont make a difference.
a second issue is heat, a faster charging battery generally charges warmer than a slower charging battery. however the phone will still not get as hot as a phone sitting in the sun, or playing a high graphics intensive game.
i would like to adjust the kernel to allow higher frequencies, how much of a higher frequency? well that would require bench testing. but a higher frequency indeed
has anyone played with these settings in the kernel, or done any benchtesting on the matter? id be very interested to hear your findings.
It's not possible.
http://forum.xda-developers.com/showthread.php?t=1468834
This has been asked more times than I've been able to keep count on here over the past month :-/ Answer doesn't change (unless you want to blow **** up).
so then the only way is to use an external battery charger?
because i know for a fact, an external battery charger can charge a battery very fast, ive experienced this first hand
on that link you posted, it said that the sgs2 charging limit is 650mA, but the USB charge is set lower.. has anyone raised the USB charge to 650mA? this would at least help my phone charge faster in the car, or while plugged into my laptop
soraxd said:
so then the only way is to use an external battery charger?
because i know for a fact, an external battery charger can charge a battery very fast, ive experienced this first hand
on that link you posted, it said that the sgs2 charging limit is 650mA, but the USB charge is set lower.. has anyone raised the USB charge to 650mA? this would at least help my phone charge faster in the car, or while plugged into my laptop
Click to expand...
Click to collapse
The USB charge is not set to low, the current given by that of a computer USB port is less than 650mA (500mA if i remember correctly) and also depending on the car charger the output (might) be less than 650mA. I use the same computer USB cable with an external USB charger and i notice 2 things:
1- Since the phone pulls the required current from where ever the USB is plugged in, if it has capability of providing 650mA the phone will take 650mA. And with the external USB Charger (iSound Portable Charger) i can charge the phone in 3 hours.
2- Secondly while plugged in the iSound it shows charging "AC plugged in" this is because it can provide 650mA (which is the same as the wall outlet adapter)
Actually from what I know, and correct me if I'm wrong, even using the charger that comes with the sgs2 isn't the healthiest choice for your battery because the voltage is high to cut down on charging time. The best should be by connecting to your pc
I think it is the amps of the charger what makes a difference in charging speed
Sent from my Galaxy Nexus using XDA
Jetmantrunks said:
Actually from what I know, and correct me if I'm wrong, even using the charger that comes with the sgs2 isn't the healthiest choice for your battery because the voltage is high to cut down on charging time. The best should be by connecting to your pc
Click to expand...
Click to collapse
Mistakenly pressed the thanks button, instead of the quote lol
Anyhow see if the phone is plugged in to the device that can provide as much current from 0.1A to 2.2A (from simple devices to Iphone <- they require 2.2A) the phone automatically draws the amount of current it is made to draw which is SGS2 is 650mA which is coincidentally the same as the wall outlet adapter.
I might be wrong, so correct me if i am.
I as thinking of lower the 650Ma AC rate to 450Ma or less, to allow the phone to slowly charge up overnight, with the aim of finding a rate that acheives a 5-6 hour charge time from empty.
Any thoughts? I was just thinking it should cause less heat and perhaps extend is life accordingly?
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
Click to expand...
Click to collapse
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.