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[Q] Can't charge from Computer USB cable

Hey all,
I often charged my g1 through a USB cable from my computer (rather than from the wall). When I do this for the g2x, it doesn't seem to charge. It either retains it's charge, slowly discharges (more slowly than if it wasn't plugged in), or if I am using an intensive app (e.g. pocket legends) it will keep discharging quickly. Is this normal or is this just me/my phone?
I am using the cable that came with the phone that I also use to charge through the wall (so not a cable issue).
Thx

It charges fine through my computer but keep in mind it will be a slower charge on any device. Maybe it's more slow than it should be on yours.

davem666 said:
Hey all,
I often charged my g1 through a USB cable from my computer (rather than from the wall). When I do this for the g2x, it doesn't seem to charge. It either retains it's charge, slowly discharges (more slowly than if it wasn't plugged in), or if I am using an intensive app (e.g. pocket legends) it will keep discharging quickly. Is this normal or is this just me/my phone?
I am using the cable that came with the phone that I also use to charge through the wall (so not a cable issue).
Thx
Click to expand...
Click to collapse
Did you try using other USB ports on your computer?

I've tried multiple ports and multiple computers (not multiple cables cause I only have 1, but the cable does charge through the wall adapter). I've left it plugged in to the computer for the past 2 hours with minimal use (basically just checking battery monitor occasionally) and I am losing ~2% charge an hour (I'll post a screen-cap after a few more hours of "charging").

mine charges.. very slow.

You should never charge your phone from a computer usb cable. There isn't enough amps to charge your phone while it is on and running. If you play games or listen to music while connected and charging from your computer's usb cable you will still run down the battery. The charger that came with the LG G2x is 1Amp or 1000MA! My previous Samsung Galaxy was around 700MA. Best way to charge your phone is to turn it off while it is plugged to the AC adaptor and use a high amp output charger like the stock charger. If you use generic ones with lower amp output like 500Ma, it will take longer.

grenademasta said:
You should never charge your phone from a computer usb cable. There isn't enough amps to charge your phone while it is on and running. If you play games or listen to music while connected and charging from your computer's usb cable you will still run down the battery. The charger that came with the LG G2x is 1Amp or 1000MA! My previous Samsung Galaxy was around 700MA. Best way to charge your phone is to turn it off while it is plugged to the AC adaptor and use a high amp output charger like the stock charger. If you use generic ones with lower amp output like 500Ma, it will take longer.
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Click to collapse
The chargers for the gs and g2x both have the same amps. And Hz.
Where did you find that info?
Sometimes I still use my gs charger on myg2x. Both charge in the same amount of time.
But if it is true ill stop that right now.
Sent from my LG-P999 using XDA Premium App

Charging very slow using USB on a PC

Anyone else having this issue? Went from completely dead 0% to now 17% in 2 hours! Maybe it's a bad battery? Used to charge from 0% to full battery in about an hour or less
Sent from my LG-P999 using XDA App

Yeah I have noticed that, it's iffy sometimes it charges normally on my pc then there times when it just crawls like today it was at 57 % for like 1 hour I rebooted it thinking something was wrong.
My phone was very hot tho maybe that had somthing to do with it idk
Sent from my LG-P999 using XDA App

never use your micro usb cable connected to your computer to charge your phone. If your phone is ON and playing music or something else, that will still run down the battery even though it is connected to the computer. Your LG G2x charger that came with your phone is rated at 1 amp. The computer usb port is giving out a fraction of that. Even cheap chargers from China that are 350mA - 500mA will take forever to charge your phone. I use spare Blackberry chargers that are less than $5 and offer 700mA. They are great and cheap.
http://www.amazon.com/BlackBerry-Fo...PN0S/ref=sr_1_1?ie=UTF8&qid=1309054355&sr=8-1

grenademasta said:
never use your micro usb cable connected to your computer to charge your phone. If your phone is ON and playing music or something else, that will still run down the battery even though it is connected to the computer. Your LG G2x charger that came with your phone is rated at 1 amp. The computer usb port is giving out a fraction of that. Even cheap chargers from China that are 350mA - 500mA will take forever to charge your phone. I use spare Blackberry chargers that are less than $5 and offer 700mA. They are great and cheap.
http://www.amazon.com/BlackBerry-Fo...PN0S/ref=sr_1_1?ie=UTF8&qid=1309054355&sr=8-1
Click to expand...
Click to collapse
It's very similar to the TF101; it seems most Tegra devices use a charging cable more like USB 3.0 than 2.0, which pushes a lot more power and charges the device quickly but when plugged into a 2.0 port the charge slows to a crawl. USB 2.0 simply isn't designed to push the amount of power these newer devices require.

When I try this it will not charge my phone. I tried on several computers at home and work Pc's. It actually drains it.
I wonder why that happens???
Not a big deal.
No problem, I always have to take my charger everywhere I Goto be safe.
All computers using USB 2.0 or USB 2.0 add-on cards.
Sent from my LG-P999 using XDA Premium App

grenademasta said:
Your LG G2x charger that came with your phone is rated at 1 amp. The computer usb port is giving out a fraction of that.
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Click to collapse
Yes, a fraction of 0.5. USB ports can provide up to 500mA.

I just charged mine at work using a USB cable plugged into my monitor. I noticed that trying to charge it off my laptop doesn't seem to get me anywhere. It might require using a powered hub or something similar to get enough juice.

I usually slowly lose charge when plugged into the usb at work. Granted the screen is almost always on and the phone being used.

I've noticed the charge rate for differs depending on the usb charger rating.
For example, on my laptop usb, it charges very very slowly. but when plugged into my desktop, it charges just very slowly. So they must have different current ratings.
When using my eee transformer usb plug ([email protected]), it charges the phone very fast, like under 2hrs. When using a usb charger meant for a blueant headset ([email protected]), it takes like 4hrs to charge. Think the stock charger is at [email protected]
I use Battery monitor app to monitor my batt usage/drain. Haven't really paid attention to the battery gain, but from looking at past history graph, think when plugged into the laptop, it supplied like 5-15ma of juice. When plugged into destop it looks like at 55-400ma. The transformer usb provides up to 1200ish ma, and the stock gives 800ish ma.
Now does using different rating chargers affect the battery discharge rate and health of the battery?

Just because a USB port on a PC says it'll output 500ma doesn't mean it will, it's all up to the software. If your PC or phone is cranky and doesn't communicate properly, your computer's USB port will default to 100ma, and you can't charge off that
Mine charges fine on USB unless I'm trying to use it, then it is pretty much break even.

[Q] Can't charge off PC USB?

My Photon Q won't charge off a PC USB port, or my laptop. Is this common? Thanks.

Are you using the usb cable that came with the phone? Reason I ask....I've discovered this phone is extremely picky about the cables you use. So far of the ones I have on hand, I can only consistently charge while in the car using my Belkin usb charging adapter with the Motorola cable that came with the phone. That includes a fairly nice ferrite core 6ft usb cable I got from Monoprice...which it works fine at home on AC, but in the car it stutters back and forth between charging and not charging.

Just today I used a cheap USB cable I bought off of ebay to charge my PQ using my laptop.
Its one of the ones sold as "HTC OEM USB Charger + cable" on ebay for like 3 bucks.
I also charge it at home using a green 3m cable from ebay, also bought for like 3 bucks lol.

Does it require that drivers be installed on the PC to get a charge? I've tried a few cables that I have laying around. I'll see if I can find other cables to try. The weird thing is if the phone is off, and plugged in, the LED lights up green, as if it's charging. But using the same cable, if the phone is on, it won't acknowledge that it is plugged in.

tcrimsonk said:
Does it require that drivers be installed on the PC to get a charge? I've tried a few cables that I have laying around. I'll see if I can find other cables to try. The weird thing is if the phone is off, and plugged in, the LED lights up green, as if it's charging. But using the same cable, if the phone is on, it won't acknowledge that it is plugged in.
Click to expand...
Click to collapse
No, I wouldn't think so...
I've been able to charge off of many different USB cables on my Q. Not sure... Only thing it's been picky on so far is the wall wart - cable it hasn't seemed too picky about.

If its an old desktop with USB 1.1 it may not charge, and many laptops won't allow charging via USB if the laptop itself is not plugged into AC. Just a thought.
Sent from my XT897 using xda app-developers app

bryanfritz1 said:
If its an old desktop with USB 1.1 it may not charge, and many laptops won't allow charging via USB if the laptop itself is not plugged into AC. Just a thought.
Sent from my XT897 using xda app-developers app
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Click to collapse
Very good point ^^^. I've heard some laptops, even when plugged in, still don't provide enough juice to charge (some) devices. Perhaps your laptop is one of these low-power USB port devices.

ive noticed that this phone is picky about what charger you use. i have a hard time charging on my pc as well. and certain micro usb's i have dont seem to charge it well either. needs to be the stock plug it came with.

I've basically given up at this point. Blackberry AC chargers work well for me, so I'll try and track down a few more of them. Otherwise, nothing is consistent. The desktop I've used has a plenty big enough power supply, and it charges my Epic with no problem. My personal laptop and work laptop both charged the Epic, but not the Photon Q. I guess I'll just have to carry around a charger instead of a MicroUSB cable when I'm on the road with my laptop.
Thanks, all.

tcrimsonk said:
I've basically given up at this point. Blackberry AC chargers work well for me, so I'll try and track down a few more of them. Otherwise, nothing is consistent. The desktop I've used has a plenty big enough power supply, and it charges my Epic with no problem. My personal laptop and work laptop both charged the Epic, but not the Photon Q. I guess I'll just have to carry around a charger instead of a MicroUSB cable when I'm on the road with my laptop.
Thanks, all.
Click to expand...
Click to collapse
All,
For what little it's worth, I just noticed that the words "Not Charging" come up on the lock screen whenever I connect to the USB port of my laptop or desktop. So the PQ knows it's plugged in; it just refuses to accept the charge.

Also, whenever the battery completely dies, the phone will start to charge. It will charge for a few minutes until it has enough battery to turn itself on. As soon as it turns on, it stops charging, and a minute later, shuts down because of the dead battery. Then it starts charging again. This basically gives me an endless loop of the phone charging, starting, discharging, and shutting back off. I can't even get it to stay off long enough to get a useful charge without turning on automatically.

Yeah, the only issue I've had with this phone at all is the extreme 'quirkiness' it has in regards to charging on anything other than the stock usb cord & power adapter it plugs into. Even using the Moto vehicle dock for the Q, its completely hit/miss on charging. It will *often* go into that 'Not Charging' state where its kind of keeping sort of a baseline/'stalemate' of the current charge level for me, not really going down but not charging back up either. Not really sure what's up with that. With my vehicle dock for the longest I kept thinking maybe my cig lighter port on my car is bad, but I don't have issues with my radar detector at all.

Had the same problem with the not charging a few days back. I was leaving the phone in Mass Storage mode because just getting it into Mass Storage was a headache originally.
Hooked it up to it's original cable and woke up with 65% battery. Switched from mass storage to charge only and it started charging.
Not sure if it was caused by being in Mass Storage and wouldn't charge but now I put in Charge Only before bed.

It always works (in my experience) with the original cable that comes with it regardless, its anything else where its quirky.

PythonFanTN said:
It always works (in my experience) with the original cable that comes with it regardless, its anything else where its quirky.
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Click to collapse
Isn't there a setting in ##3282# that enables and disables USB charging? Y'all have probably thought of this already. Anyways just thought if throw that out there. This is my first android that was not a low usage device. I know very little about it. I seriously think xda should make tee shirts that say "everything I have learned in life I learned from xda".

My phone was not charging in debugging mode yesterday.
Sent from my XT897 using xda premium

Charging slow???

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.
Sent from my SCH-I535 using xda app-developers app

Must have been charging in USB mode.
Sent from my SCH-I535 using xda app-developers app

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.
Sent from my SCH-I535 using Tapatalk 2

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
Sent from my SCH-I535 using Tapatalk 2

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.
Sent from my SCH-I535 using xda app-developers app

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
Sent from my SCH-I535 using Tapatalk 2
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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.
Sent from my SCH-I535 using Tapatalk 2

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.

Using the keyboard dock as an external charger?

Hello everyone,
I recently found I could charge my phone by plugging the micro-usb cord into the USB port in the keyboard dock that is usually used for a mouse. Anyway, my question is would you be able to efficiently use this method to charge a phone, or does the USB port not put out enough power to charge the phone in a reasonable time?
Sent from my Nexus 4 using Tapatalk 2

ive used it to charge my ps3 controller a few times but not tried a phone but i think it will drain the dock pretty quick but hey give a go the dock charges from 0% to 100% in about an hour so try it out