Am I right in thinkijg if you charge your phone via USB it takes longer to charge compared with a mains charger?
Would a USB cable that is plugged into a mains charger be the same speed, or slower, than a normal mains charger?
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Wall chargers have more megabytes than you puter.
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Informative
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I've noticed that if i plug my phone to a wall charger (i got a Xperia P with mini-usb port to charge and sync) it will charge twice as fast as with the usb. Maybe because it as a fast charge feature, but generally on USB my phones rechargered slower than with wall adapter. Probably because of the voltage.
When I'm in a hurry, charging with the wall charger certainly gets the job done.
It's not the voltage it's the current. USB ports on a computer don't have much ass behind them and can't support a heavy current draw, they're just not designed for it. Most allow about .4A (amp). Wall chargers generally range from .7A- 1A. Iphone chargers are much higher in the 2A range.
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If it was easy you'd of hired the guy at Home Depot to to it.
If you look at the wall charger you'll probably notice it says something like "Output : 1000 mA". When charging from a USB port, you're most likely drawing only 500 mA.
500 mA is half 1000 mA.
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After using a wall adapter to micro USB port charger that only supplies 0.7 A instead of the 1 A the stock charger does, the lower adapter got very hot. Does the phone still try to draw one amp if its not connected to a PC through usb? Considering the standardization of micro-usb it would seem like G2x owners will try to use chargers at friends houses for other phones and it may not be the safest thing. Any input?
My factory LG charger only provides 0.7 amps.. but I use my hd2 charger that provides 1 amp cause the phone charges a little faster on it.. so I don't understand what your actually trying to say?
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k00zk0 said:
After using a wall adapter to micro USB port charger that only supplies 0.7 A instead of the 1 A the stock charger does, the lower adapter got very hot. Does the phone still try to draw one amp if its not connected to a PC through usb? Considering the standardization of micro-usb it would seem like G2x owners will try to use chargers at friends houses for other phones and it may not be the safest thing. Any input?
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Phone can only draw as much power as the charger supplies, up to something like 1 amp. If the charger supplies less than that, then it only draws what the charger supplies. If the charger supplies more than 1 amp, then it will still only draw the 1 amp that it needs. The more important thing to ensure is that the voltage of that charger is the same as the stock charger.
G2X CM7
squish099 said:
My factory LG charger only provides 0.7 amps.. but I use my hd2 charger that provides 1 amp cause the phone charges a little faster on it.. so I don't understand what your actually trying to say?
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It's strange we got different chargers. This one outputs 4.8V at 1.0A. It also squeals when the phone is in standby. If i wake it it stops humming. Model STA-U13WR2. I wonder if charge rate has to do with anything bad? When the charge says completed and it is plugged into a USB port, it will charge for another hour at times. Makes sense since a high charging rate will cause the battery voltage to spike and read as if the charge is complete when it's still got room.
can the epic pull more than 500 ma if the charger is able to provide it ?
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The stock Charger can deliver 700mA, so yes. If I remember right, there are two charging modes, 300mA for USB and 700mA for a wall outlet. Now if you only provide 500mA it will pull 500mA as long as it doesn't detect it is plugged into a USB port.
I wish Android had an app that forced the phone to draw as much current as was available, for instance USB 2.0 ports actually can output 900mA max and my old Touch Pro had an app that let my phone draw max current no matter if it was plugged into a computer or charger.
I've noticed that charging with 500mah charger, charges the battery MUCH slower than a 1000mah (1amp) charger, which charges really fast. I'll need to time it, but I'm thinking the 1000mah charger charges the stock battery in less than 2 hours, where as the 500mah charger takes many hours, I usually let it charge overnight.
My question is, is there any performance gain to slow charging vs fast charging? ie: slow charging giving a deeper charge, vs fast charging?
any opinions?
i use a 2amp charger i had already that fully charges the O3D in around half an hour/45 mins. get the same runtime whether i use that or the stock charger.
hefonthefjords said:
i use a 2amp charger i had already that fully charges the O3D in around half an hour/45 mins. get the same runtime whether i use that or the stock charger.
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Any chance of a link to this charger, I'd really like that sort of charging speed.
Pete
My guess would be anything that would charge an iPad... those require like 2.1amp, so that would be a 2amp usb charger.... I've seen 2.1amp home chargers, car chargers, etc... all because of the ipad I'm guessing.
Its not that simple. Any device that uses USB for charging can only pull 500ma, that's a universal agreement. To get around this each manufacturer uses a method of "informing" their device that it is connected to a charger that can supply more current (HTC shorts the data leads in the supplied charger I don't know what LG does). I have a 1amp car charger but it still only gives 500ma but the genuine LG charger gives an amp because the phone "knows" it can supply more.
I'm going to stick a test meter into my LG chargers over the holidays to see how the data leads are connected.
Pete
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The charger i have is a noname brand. I bought it from walmart for 6 quid. It also came with a 2amp car charger and a micro usb cable.
Micro usb cables are not standardised like that. Ive never heard of such a thing at all. As far as i know most phones will "fast charge" if they dont detect a data connection and dump as much current as they can into the battery so you can pretty much present them with whatever current you like and the charge time will just get faster. There is probably a hardware limit to that somewhere in the charge circuit but i dont know what the limit is. 2amps is the highest power usb charger ive seen but its not exactly aomething i regularly keep an eye out for.
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Slow charging is always better as this will allow the optimal number of battery cycles before the battery's capacity will start to degrade.
So if you only ever slow charge then your battery will have a longer life cycle.
Can we use fast charger on our HoX?
Our original charger is darn too slow to charge fully our Hox so anybody tried using other charger like the charger for iphone or Nook or Smasung? Cause my nook tab
charge much faster than my Hox which also has bigger battery and my iphone also charge much quicker. Would doing such thing destroy our battery or degrade for that matter? Anyone experimented on that?
The HOX charger is 1A which is what the phone will accept. The iphone charger is also 1A.
I havnt even opened my HOX charger or cable. Just using generic 1A charger from another phone.
I've been using my Kindle charger without any problems, though I don't know what the output is.
Cant you find out what is the output of your Kindle Charger?
I have a Nook Charger here which is 1.9A and Im afraid to use it because
it might degrade my battery and since our battery is internal..it would be
difficult to have it change.
I may have found the answer here in XDA here is it
*NC=Nook Color
The answer is it depends. Here's the options:
NC, NC cable, NC charger - Life's good, 1.8A charging rate
NC, NC cable, other charger - Depends on the profile and circuitry of the charger, could be 500mA, 1.5A, or 1.8A.
NC, other cable, NC charger - You'd better use a heavier gauge wire, because even though you're not using the NC cable, USB spec says that the device may request up to 1.8A if available. NC will decide what it wants here.
NC, other cable, other charger - You'll get 500mA, 1.5A, or 1.8A, depending on the charger. Again, be careful of amperage on the cable
other device, NC cable, NC charger - *should* work, but I don't recommend it. I think ground carries a high voltage for some reason, since I've seen my USB hubs resetting and sparks coming from the connector at times
other device, NC cable, other charger - this really should work, but you're not going to get faster charge times, since again it depends on the output of the charger. I'd still be cautious since the NC cable has something wierd going on.
other device, other cable, NC charger - Go for it. I've gotten 1 hr full charge times on my phone with this method. You MUST use a heavy enough gauge USB cable.
other device, other cable, other charger - depends on device draw and charger profile mode
Yes. When I'm in a hurry I use my hp touchpad charger. It charges my phone an hour faster than the HTC one from under 10% to full.
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Modern smartphones manage the current they pull and can't be charged more than they can handle....
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As far as I know, if you plug in your Nexus5 (or any phone) into a power source with high amperage (>1A), your phone should utilize the amps it actually needs to charge at full speed (AC Charging).*
For example, if i plug my Nexus 5 into a 2.1A charger, it will charge just fine and draw only the required amps needed.*
Ive noticed my phone (rooted with faux) and my wifes (stock) and very finicky when it comes to the amps a charger uses. *It appears that if a charger is not exactly 1.0A or 1.2/1.3A, the phone charges as USB and not AC (no matter which USB cable I use). *Below is what I have found out, *with charge type/amp and how the phone sees it
Stock charger (1.2A) - AC
Anker 25W 5-Port Wall charger (1A Android port) - AC
Anker 25W 5-Port Wall charger (1A iPhone port) - USB (not sure why??)
Anker 25W 5-Port Wall charger (1.3A Galaxy Tab Port) - AC
Anker 25W 5-Port Wall charger (2.1A iPad ports) - USB
Anker E4 13000mah battery (2A) - USB
ANker E4 13000mah battery (1A) - AC
Anyone else experience this?
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What you've observed here actually has nothing to do with the amperage of your ports and everything to do with how their data pins are wired. The N5 (and most other android devices) looks for the data +/- pins in the USB port to be shorted together, this is how it determines it's connected to a charger. Apple devices do this differently, they look for a specific combination of voltages to be present on the data +/- pins. When you connect your N5 to an Apple port, it ignores these voltages and just charges as if it were connected to a PC.
Now the fact that it sees the Galaxy Tab port as a charger is kind of interesting because the Tab uses yet another method for charger detection. It looks for resistors of a specific value connecting the data +/- pins to the power +/- pins. Cool that the N5 recognizes this configuration as well.
Anyway, this is why your Anker charger has ports dedicated to specific devices, each one is configured a little differently.
That would make sense, however, I would expect the same thing on my Nexus 4 but that doesn't happen. It charges as AC for every port
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It could simply be that the N4 uses a different power control IC from the N5 (they almost certainly do). That and the software controlling the charging determine whether the phone enables AC charging from different ports or not.
I believe (I have not tried this) that some custom kernels have a setting that enables fast charging unconditionally, to draw as much current as the hardware allows.
Yeah I'm waiting for a kernel to support Fast charge, don't believe any do at the moment
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the phone may revert to lower power usb charging if some condition isn't met... the phone is completely ignorant of the rated power of the wall wart. current is drawn, it depends on ohms.. so it has nothing to do with the "power output." what i mean is there is no situation where too many amps is going to trigger something in the phone, the phone controls the amps and is ignorant of the max the supply can give unless the phone actually exceeds that and detects a voltage drop, the supply can't force more amps without raising voltage to do so but that's just not how these devices work. so it's not because of the amps of the charger, it must be some other aspect.
what the phone can see is voltage. the state of the microusb "Id" pin (which will probably be open if you are using a data cable and not a specific dock to put it in desk mode or car mode, not that i think the n5 has those modes, but the Id pin is what tells the phone these things, as well as set them into download mode to flash them) and the state of the data pins. generally the data pins need to be shorted together to tell the phone to go into ac charging.
it's possible however that if the voltage is lower than 5v, the phone assumes there is voltage drop from too low a power rating on the supply and it's unable to supply the current. in this situation the phone may default to a lower current charging mode. some ac chargers may not go all the way to 5.0v they may put out as low as 4.45v... if the voltage is either low or unstable from the "high output" charger it may cause the phone to think it has exceeded the output rating of the supply when infact it's just getting unclean power. try it with an official tablet charger for a kindle or something and not a store bought anything..... some of the high output chargers just have substandard regulators and/or filtering.
there may also be more to this. usb 3.0 has a higher current rating than usb 2.0 if the phone can detect the type of port it's connected to, that may also determine the charge mode.. (in thoery anyway, no reason it can't work that way, but i can't say i know that it does on any current device)
It's getting pretty aggravating now that my Nexus 5 charges as USB when connected to my anker slim 2 1A external battery as well as my anker astro e4 1A port. No reason why it should do this
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If you use a fast charging USB cable with the proper pins shorted you should get it to charge with in AC mode. I grabbed one from Amazon and it changed from DC to AC on the same charger.
jalanjkcarp said:
If you use a fast charging USB cable with the proper pins shorted you should get it to charge with in AC mode. I grabbed one from Amazon and it changed from DC to AC on the same charger.
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Oh thanks for that tip. I'll order one on Amazon right now and update this thread
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What happens if you connect an Apple device to one with the shorted pins?
Earth explodes
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jalanjkcarp said:
If you use a fast charging USB cable with the proper pins shorted you should get it to charge with in AC mode. I grabbed one from Amazon and it changed from DC to AC on the same charger.
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Tested the new USB cord on all ports, charges as AC. Thanks a lot
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