Database Users

Why does Battery take eternity for some to charge? I think...

Like many of you guys, I have custom built my own PC. Yeah, it's a little outdated with a Q6600 but it will do for a good year or two more. Good thing I bought a Quad Core. But anyways, getting back to topic, you guys should realize that the Power Output of the front two USB ports are not the same as the USB ports that are in the back. This is a fact as far as my system is concerned. I know because I use a Lacie External drive which will only power on with the rear USB ports.
If you charge the SGS with the included wall charger, it will charge up in about 4 hours. When I leave it on my front USB port, I would wake up in the morning only to find it 60-70 percent full.
PS - I am amazed by the battery of this thing. Here is the break down. I fully charged by 1am. Took it off... then started using it quite a bit till around 3am ish. When I went to bed, the charge was at 72 percent. I work up 6 hours later and guess what, it was at 69 percent. Pretty neat.

The USB 2.0 only requires that a motherboard provides 150mA to a single port (& 500mA to 5 ports). Where as a chargers don't conform to this standard and provides a much higher charge, which charges your battery much quicker.

Only use USB if you have nothing esle.
The wall charger that came with the SGS is a 700mA. I just ordered a 1000mA wall and car charger.

The more I use this phone the more I am amazed by it. The Battery life on this thing is really great. It's already been close to 12 hours (11:30) and the battery is now finally at 49%
I've used this phone quite a bit and the battery held up really well. I used Let's Golf, Navigation, Armored Strike, Calls, Texts, Gmail... Good stuff.

So your telling me if i get a charger with more mA it will charge faster? Where can i get a bigger mA charger.

I don't know, but my battery charges fast as hell. It goes up about 5% in 20 minutes.

mystycs said:
So your telling me if i get a charger with more mA it will charge faster? Where can i get a bigger mA charger.
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Yes.
Mono Price is great.
Car charger (1000mA)
http://www.monoprice.com/products/p...=10826&cs_id=1082602&p_id=3523&seq=1&format=2
Wall charger
http://www.monoprice.com/products/p...=10311&cs_id=1031106&p_id=6767&seq=1&format=2
then pic a cord length
http://www.monoprice.com/products/subdepartment.asp?c_id=103&cp_id=10303&cs_id=1030307
Ebay has tons also, just search and look at the specs. You want to make sure it says 1A or 1000mA
BigWorldJust said:
I don't know, but my battery charges fast as hell. It goes up about 5% in 20 minutes.
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5% in 20mins, that's 15% per Hr, or 6.5 hrs from empty to full. You are happy with about 6.5 hrs for a full charge?

SykesAT said:
5% in 20mins, that's 15% per Hr, or 6.5 hrs from empty to full. You are happy with about 6.5 hrs for a full charge?
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LOL , kids today are inept when it comes to arithmetic but cmon...

Aight more like 10% every 20 minutes, lol. I didn't know this was a math class, sorry. It is the summer you know -_________________________________-.

will it hurt the battery life or shorten the amount of time you can use the battery if you use a higher mA? because if it wont then why didnt Samsung just include a 1000mA charger with it?

alecjake said:
will it hurt the battery life or shorten the amount of time you can use the battery if you use a higher mA? because if it wont then why didnt Samsung just include a 1000mA charger with it?
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It will do neither.
read this. Gives some basics on Li-ion batteries. link
Essentially these batts can and should be charged at 1C c=capacity. Our batts are 1500mA so we could and should charge at 1500mA.
Slower charging is fine but these batteries rely on circuitry recognizing a drop in voltage to turn the charge off, or down to a lower current as to not damage the battery. If you charge at a higher rate the drop in voltage is more obvious than with a lower voltage and harder to miss thus less chance of an overcharge and battery damage. Added bonus is the battery charges quicker
Over charging is the killer of batteries. Overcharge occurs more from circuitry missing a change in voltage and failing to terminate.
Hope this helps.

alecjake said:
will it hurt the battery life or shorten the amount of time you can use the battery if you use a higher mA? because if it wont then why didnt Samsung just include a 1000mA charger with it?
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If you were an engineer and could save the company one cent, how would you do it? That was about one cent worth of cooper in the charger times ten million devices.you just made your year end bonus.
A dedicated chip inside the phone regulates the battery charge.

SykesAT said:
Yes.
Mono Price is great.
Car charger (1000mA)
http://www.monoprice.com/products/p...=10826&cs_id=1082602&p_id=3523&seq=1&format=2
Wall charger
http://www.monoprice.com/products/p...=10311&cs_id=1031106&p_id=6767&seq=1&format=2
then pic a cord length
http://www.monoprice.com/products/subdepartment.asp?c_id=103&cp_id=10303&cs_id=1030307
Ebay has tons also, just search and look at the specs. You want to make sure it says 1A or 1000mA
5% in 20mins, that's 15% per Hr, or 6.5 hrs from empty to full. You are happy with about 6.5 hrs for a full charge?
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I just visited the links you put up and chatted with the live chat team and they have no cables currently for the vibrant ?
where did you find it on the site
thanks

HOw many mA is the charger the phone came with?

leechdweler said:
I just visited the links you put up and chatted with the live chat team and they have no cables currently for the vibrant ?
where did you find it on the site
thanks
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all you need is a USB - Micro USB cable.

mystycs said:
HOw many mA is the charger the phone came with?
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700 mA. See the info panel on the charger, it'll tell you.

So a charger with more mA will charge my phone faster i assume? I wont loose any battery capicaty right? It wil charge the same amount just faster i assume?

mystycs said:
So a charger with more mA will charge my phone faster i assume? I wont loose any battery capicaty right? It wil charge the same amount just faster i assume?
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Its obvious you didn't even bother reading 6 POSTS up. This thread isn't even a full 2 pages, stop being lazy.

So I bought my car charger (cigarette adapter + separate usb cable) from
"Mono Price".
Specs:
PID:3523 Car Charger (Cigarette Lighter) to USB Female Converter - Black
PID:5139 USB 2.0 A Male to Micro 5pin Male 28/28AWG Cable - 10ft
Very weird thing is happening, instead of charging my phone it drains it .
The battery icon moves back and forth as if it is charging but it drains my battery relativity fast.
5 mins using the car charger I lost 25% of battery life .
Does anyone know why this is happening ?

boodies said:
The more I use this phone the more I am amazed by it. The Battery life on this thing is really great. It's already been close to 12 hours (11:30) and the battery is now finally at 49%
I've used this phone quite a bit and the battery held up really well. I used Let's Golf, Navigation, Armored Strike, Calls, Texts, Gmail... Good stuff.
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How...? I am on my third Vibrant and i last 6-7 hours...

USB Charging Kills HD2 like in one day?

Hey! Guys I am having problems with the USB Charging, it seems to drain the 100% charged battery quicker (while using the phone, unplugged NOT charging) like one day and I have to charge the phone again, But when i charge my phone (100% charge) using the wall charger my phone lasts two and a half days. My wife also said she experiences the same thing with USB charged HTC Trinity Phone. I have tried on different computers and laptops as well but still the same and i know that USB charging will take longer to charge (500mah) so i leave the phone over night like 9 hours but the phone drains like juice. What kind of a Phenomenon is this.. Guys i need your humble thoughts and solutions on this because this is becoming a big problem for me since i use USB charging mostly... Plus I am not a very hardcore app, wifi or games user on the phone either... Darn...

same problem
I don't know why but i meting with the same problem. No idea why this happening it should be same from electric perspective.

When the phone cahrges via computer USB, the phone charges at a rate of around 90mA due to the phone running. Try with the phone off

Tried that as well, but it seems to be the quite the same but little difference since it last a little longer but still drained out in one freakin day. I am pulling my hair off because of this problem.. darn why is this just so... i mean like in the second post the process should be electronically identical right. only difference is it takes more time to charge from USB.... Grrrrr!

my phone hardly last one day..How do you make it last for 2 1/2 days?

xiyan2127 said:
Tried that as well, but it seems to be the quite the same but little difference since it last a little longer but still drained out in one freakin day. I am pulling my hair off because of this problem.. darn why is this just so... i mean like in the second post the process should be electronically identical right. only difference is it takes more time to charge from USB.... Grrrrr!
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Battery indicators do lie.

it all depends upon if your board can deliver enough current to run the phone and charge it. on my rig i see no difference between wall charger and laptop or desktop charging
the laptop is a studio 15 with an i5 and h55 chipset and the desktop is a core 2d machine with a p45 series chipset.
you can tell the phone to disable usb charging if the phone is on while connected to usb to see if that helps (it will still charge via USB if the phone is off)

anhyeuemmaimai said:
it all depends upon if your board can deliver enough current to run the phone and charge it. on my rig i see no difference between wall charger and laptop or desktop charging
the laptop is a studio 15 with an i5 and h55 chipset and the desktop is a core 2d machine with a p45 series chipset.
you can tell the phone to disable usb charging if the phone is on while connected to usb to see if that helps (it will still charge via USB if the phone is off)
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any usb not from china will give about 500mah, whether it be my i7 laptop or z550 vaio, so specific components shouldn't matter.
usb charges a little slower, but no reason it should not last as long once its got all the amps it can take. weird situation man...my huge list of htc phones never had an issue, and i do use a work computer to charge via usb sometimes

Thanks for your thoughts guys!!!
Weird... Yeah thats the thing i am also using a Core i7 930 CPU and my motherboard is ASUS ROG Rampage III Gene board, so i don't think my system is the problem here...

The wall charger delives 2 amperes to our HTC phones while usb ports delivery only 500mA (0,5 amperes). It's not only a matter of charging slower but you can't deliver the full charge the battery needs to revert the chemical process of discharging when tou use usb port. With 2amperes the charging process reachs it's maximum.

bravo261 said:
any usb not from china will give about 500mah, whether it be my i7 laptop or z550 vaio, so specific components shouldn't matter.
usb charges a little slower, but no reason it should not last as long once its got all the amps it can take. weird situation man...my huge list of htc phones never had an issue, and i do use a work computer to charge via usb sometimes
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Click to collapse
some cheap mainboards cannot supply even 500ma. a good qaulity board can supply more.
want to test it? put your HD2 in the first USB port and then put a high power device like a wireless dongle or external USB HDD in the second and see what happens. if your board cannot power both, you'll drop your wireless/hdd connection when you plug your phone in.

Phone Usage...
mbrown3460 said:
my phone hardly last one day..How do you make it last for 2 1/2 days?
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Sir I have said that I am not a very heavy phone using guy, I am an average phone user. Plus I dont use the 3g or data connection here in my country since the connections are snail slow and prices are over the head and there is no unlimited data package here yet. I use the Wifi sometimes to update my twitter, Rss hub, facebook, weather tabs and very little market place... So my phone lasts for two and a half days when i use the wall charger.
Oh yeah and Guys, i tried recalibrating the battery by using it till the phone died completely and recharging it with USB (phone turned off) for like a day but still it drains faster than the wall charger rate.... I dont understand really...

Bicalho said:
The wall charger delives 2 amperes to our HTC phones while usb ports delivery only 500mA (0,5 amperes). It's not only a matter of charging slower but you can't deliver the full charge the battery needs to revert the chemical process of discharging when tou use usb port. With 2amperes the charging process reachs it's maximum.
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This is why. The awnser was given, but people ignored it. To fully charge a battery it needs more amperes. Use the wall charger. The battery indicator lies, and is unable to acuratly measure a fully charged battery. It'll display 100% when it's roughly 70%.
Our batteries use Lithium ions as means of electricity. They use a Lithium compound, and move the ions from the negative to the positive pole. When there are no more ions to move, our batteries are discharged. When we connect to an external power source, the higher voltage will draw the ions back to the "negative pole".
USB supplies 500 mA (that's 0.5A) @ 5V (per specification, some motherboards won't be able to go that high, depending number of USB devices connected, etc)
European electrical sockets supply up to 2.5A @ 230V and although your HTC charger should only output 1A @ 5V, the topping off will occur much quicker.
Basically the more you have to charge, the more time it takes, and the bigger the effort on the current to pull the remaining ions back to the negative pole.

I am finding that in Android, my phone will not charge with either wall or usb charging. The phone shows that it is charging but does not actually charge. This is really unacceptable. It works in Windows Mobile but is not a listed problem of the Android builds. Are all of you using WM6.5 or Android? Or both?

jaylc said:
I am finding that in Android, my phone will not charge with either wall or usb charging. The phone shows that it is charging but does not actually charge. This is really unacceptable. It works in Windows Mobile but is not a listed problem of the Android builds. Are all of you using WM6.5 or Android? Or both?
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I can Charge my HD2 well on both OS's but still when compared to android and WinMo when i use the USB Android does discharge heavily than WinMO and Android does the same when compared to WinMO on wall charger use as well... So nothing much more to say at that...

Charging mobiles using USB takes alot longer than using power outlet and this is valid for all kind of mobiles, ALSO when you charge by USB your mobiles battery drains much faster than charging from power outlet. (Electrical Engineers say so).
NOW why you don't use power outlet to charge your HD2 rather than using USB?

There are safety measures in charging from USB like, static issues from wall charger in some countries and then there is the ease of use from charging from PC while you are at work or away on a business trip..

mbrown3460 said:
my phone hardly last one day..How do you make it last for 2 1/2 days?
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Click to collapse
Mine lives for 5 days on just 1 charge, and with normal use (every 2/3 hours updating weather and twitter, sometimes call, sometimes texting, sometimes using internet)

USB/AC Charging Discussion

Decided to make a seperate thread for this. Maybe a mod could move those posts over...
scoob8000 said:
This is very interesting.. Gonna order one of those adaptors. I have another possible source that I'll call and see if they can get them.
Dx rocks but I lack the patience to wait for overseas shipping.
Food for thought..
I have a cheapo 4 port usb hub on my night stand for charging all my devices. It is limited to 500ma per port. Ive noticed it won't charge my atrix. Guessing 500ma isn't enough..
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Rred said:
scoob-
"It is limited to 500ma per port. Ive noticed it won't charge my atrix. Guessing 500ma isn't enough.."
No, physics doesn't work like that. If the VOLTAGE from your USB device is above the charging voltage for the phone, even a 100mA charger would be enough to charge the phone up. It would just take a long time, perhaps 22-24 hours to do so.
The normal Moto chargers are about 1000mA and they charge the phone quickly, usually two hours or less. But Moto has been making very generous chargers for years, they even supplied a 1000mA charger with my bt earpiece, which doesn't need that much power at all.
If a 500mA charger hasn't fully charged your phone in 4 hours, there's something else wrong. Bad wire, bad contact, not plugged in tight...or the "Made in China" effect.<G>
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_Dennis_ said:
No you are wrong sir. The phone will not charge on a 500 ma charge. It will use less battery but 500ma charger is not sufficient to both power the device and charge it. Also the charger supplied it 750ma charger and if you are running 1.2.6 the phone will refuse 1a chargers. Just because something provides voltage in the correct range does not mean ut provides enough energy to charge something else. Voltage is potential current is actual power. Just plug your phone into a USB socket without the computer having drivers (there by limiting the socket to 500ma) it won't charge.
Sent from my MB860 using Tapatalk
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scoob8000 said:
Sorry OP for the threadjacking..
I'm familiar with Ohm's law, where I was headed is I think the phone may be doing one of two things. (purely guessing )
It may just be adhering to USB specs. It realizes the hub is a USB device and not just a charger. Since there is no computer on the other side, to negotiate more than 100ma it just doesn't charge.
Or the voltage drop @ 500ma (my hubs max per port) is just too high to enter charging. Worth noting, is when the battery is >90 and I plug the hub in, the notification led lights, but the battery still discharges.
I need to hack up a usb cord to take some voltage/current measurements. Maybe I'm just being OCD, but I like to "slow charge" my devices while I sleep.
[edit] I think I'm going to try making a charge only USB cable... That might answer some questions
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Rred said:
Dennis?
"It will use less battery but 500ma charger is not sufficient to both power the device and charge it."
Powering the phone, and charging the phone, and simultaneously doing both, are three different things.
The 500mA is sufficient to CHARGE the phone, that's all I said. I have no idea how much power it takes to POWER the phone with all four radios (BT, GPS, Wifi, cellular) active and music or Angry Birds playing at the same time. The power drain for each of those may be significant.
But since the phone has a ~1900mAh battery, you can establish the phone's power drain by turning on "everything" and letting the battery drain from full charge. If it takes four hours to go dead...yes, the phone may consume 500mA all by itself, leaving nothing to charge the battery. Again, that's physics, and it applies the same way to every laptop and phone on the market, and other devices that use adapter/chargers.
I stand by what I said: 500mA will fully recharge the battery in about 4 hours. I did NOT say it would power all four radios and play music as well as charging the phone at the same time. You'll have to do your own math to find that out, but the physics remains the same. My phone usually charges while I sleep, and a 500mA source will do that very nicely, with just the cellular radio enabled, and not in conversation.
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So I just made a little USB breakout cable so I could do a little investigation..
Oddly, even with the stock charger and the data lines disconnected the Atrix will not charge. I'm supecting most AC chargers must supply power on the data lines as well, or do something with them that triggers the device to charge.
As for the voltage, my hub and oem charger both throw out 5.12v with no load. When I plug the phone in, there is no drop at all.
From what my googling turns up, I may need a 180ish ohm resistor between the data lines. The phone looks for that to enter charging mode. Apparently this is why the drivers are needed for charging on some computers. Instead of resistance, it gets the charge signal from the pc.
So anyway out of curiosity I also took a few load readings:
Battery at 40%, screen off, phone idle: 600~ma
The most I could get it to pull was with battery at 40%, streaming last fm over a BT headset, and running quadrant. I saw around 690ma at peak.
Voice calls don't seem to make much of a difference. 10-15ma.
I'm going to check again with a full battery once it's charged. That ought to tell us what the phone itself is using.

I'm using a 550ma 5v charger because it has a longer reach. I stream music, cruise the net, watch videos and it charges my phone no problem.
Sent from my MB860 using XDA Premium App

So with a completely full battery:
Idle, screen off: 100~ma
full load (same as before): 400ma at peak

Either I am lucky and got a better one, or everyone else is wrong on the standard charger. Mine is 850ma. Also, my phone will charge on USB 2 (500ma) if screen is off and I do not use the phone. It's slow but it charges. On USB 3 it charges about half the speed it does on mains.
Sent from WinBorg 4G via XDA premium app

scoob-
"As for the voltage, my hub and oem charger both throw out 5.12v with no load."
Were you using a lab calibrated voltmeter? <G>
Most digital multimeters have a stated accuracy something like 1/2 to 1% on the DC voltages, and then they also have a "float" of 2-4 LSD meaning, the least significant digit (the rightmost one on whatever scale) may float by 2-4 digits.
So on a typical meter where you have a choice between a 2.000 volt scale, and a 20.00 volt scale, "_5.00" on the display could just as easily read "5.05" if it is was 1% off, within the limits of accuracy. And then 5.05 could read 5.09 or 5.00 as the digits float. The errors sometimes cancel out, sometimes accumulate.
I've seen much worse as they get old and out of calibration, where a "12.00" volt reading on one meter was 12.3 on another.
Which is just to say that 5.12 might actually be 5.00, or whatever the USB spec actually calls for. (It doesn't have to be 5.00 exactly.)
I had no idea they needed a signal voltage (available from the data lines on microUSB but not miniUSB) to enter charge state. That "should" mean that you can't use a miniUSB charger with a micro adapter for simple charging. I'll have to try that to see what happens. [ [LATER] Nope, something's not right about needing the signal resistor, because I just charged my Atrix using a miniUSB charger (no data signal possible) with a mini-to-micro power tip adapter, which "should" not be presenting any signal, just passing through the 4 old style connections. ]
There will still be simple--if unpublished or poorly documented--rules of physics governing what happens. Battery charging isn't rocket science, although battery chargers are sometimes "smarter" than rockets are.<G>

CaelanT,
Mines also 850ma..
Rred,
I actually splurged on a very (I think) good meter a few years ago. It's a Fluke 187. They claim .025% DC accuracy. Granted, I've had it a few years and never sent it back in for calibration.
I actually found two sides to having a resistor in the connector.
One story starts with Motorola trying to enforce people using only "genuine" chargers. Link
The other points to the data lines being shorted to indicate to the device that it is a dedicated charging device. Link Skip to the last paragraoh on this page. It's very long winded.
I actually tore apart a old car charger, in the mini usb plug there lied a small resistor between the data pins. I didn't believe how simple it was until I saw it.
Pretty interesting stuff. For us geeks anyway.

scoob, a Fluke is like a Rolls-Royce, except it is more reliable.<G>
The resistors are documented as part of the microUSB spec, they are what are often called "pull-up resistors", i.e. the voltage they provide to the fifth wire "pulls up" the voltage on that line and the tiny brains see that as a signal to do something specific.
Even the Palm Treos used this system. Not on the power line, but on the audio jack. they use a single 3-wire 2.5mm standard minijack and depending on the impedances that they see on it, they will provide mono audio, stereo audio, or mic input plus mono audio, so that three types of devices all plug into the same plug--but all three are sensed and work differently. As Arthur Clarke said "Any sufficiently advanced technology will be indistinguishable from magic."
There's no Moto conspiracy to the resistors, the new microUSB spec provides magic and the industry just doesn't want to bother our pretty little heads by talking about it in any detail.
Now, why Moto omitted the call audio routines from the library on these phones...THAT'S probably a conspiracy.<G>
I'm not reading all 480+ pages of the final USB3 spec, but it appears to refer to standard devices as consuming one "unit" of power at 150mA, with a maximum of six "units" or 900mA, and a maximum voltage of "5" which would mean that if Moto is supplying 5.12V @ 1000mA...they've exceeded the spec and aren't entitled to use the USB logo.
But if they'll fix my call audio library, I won't tell a soul about that.<VBG>

Charging tests (extension cord failure?)

Hello people!
First of all, I have a HTC EVO 3D GSM, and the tests I tried below are done on it... I just posted here because I don't think the issue I am having is device-specific (happened on the Desire and Desire HD, too - somewhat). Actually, I know this issue isn't device-specific. I'm just trying to find out if anyone else has been experiencing this, at a moment in his life .
I originally posted the thread in General discussion -> General, but the topic's been moved, rendering it useless...
I know this post is very long, but please allow 5-10 minutes of your time to go through this.
Charger : original HTC charger (1A output).
Cables : two BlackBerry microUSB cables, one is 2 inches shorter than the other. The HTC one broke after two weeks of usage, these BlackBerry ones stand up for the fight even after 6 months of abusing.
Extension cord : HAMA. USB 2.0, maximum speed 480 Mbit/s (that's what it says on the box). "Additional shielding for a good reduction of electromagnetic interference" -> so it's not double shielded (in case that matters at all). It's gray (for what it's worth). 1.8 meters long.
Battery Monitor Widget (BMW) may not show power consumption accurate while deep sleep, but it works fine when the phone is used and, THANK GOD, when CHARGING. So, with that app, I monitored the input current...
So... here's my little personal test.
Battery was at ~81%, so the input current wasn't varying because of the battery level, but because of the (****ty) cable(s). Throughout the test, the battery level got up a bit, but I tried to keep it steady at ~81-82 at the beginning of each test.
CPU @ 192 MHz - 1.51 GHz, Interactive governor. No undervolting, so the table ranges from 800mV (192 MHz) to 1175mV (1.51 GHz). Nothing changes, anyway, even if I undervolt it -75mV, so the voltage has nothing to do with it (maybe during * tests, it could mean a difference of a few miliamps, but it's not a viable solution).
Charging tests # - Wi-Fi off, Data off, Screen on Auto, off until I wake it and check the current with BMW.
Charging #1 : just with the BlackBerry cable, no extension cord. 1 minute after plug in : +800mA. 2 minutes after that : +789mA. It went up to 82%, so I discharged it to 81% and carried on with the next test.
Charging #2 : BlackBerry cable + the HAMA extension cord. 1 minute after plug in : +489mA. 2 minutes after that : +485mA. Notice that the input current was almost sliced in half.
Charging tests * - Wi-Fi on (signal ~80%), Data off, Screen on lowest brightness. Playing Star Legends (basically, it's opened, I'm not touching anything, any graphics that are going on there are hardly intense, nothing GPU-hunry is going on, so it's just sitting there). Media volume = 1.
Charging *1 : just with the BlackBerry cable, no extension cord. 1 minute after plug in : +413mA. 2 minutes after that : +471mA.
I couldn't resist and entered a PvP, so intense graphics were somewhat there, also touch points and all that... The current input was around +312mA.
Charging *1 : BlackBerry cable + the HAMA extension cord. 1 minute after plug in : -11mA. Notice it's discharging, but at a slow rate. 2 minutes after that : +31mA. So it started to actually draw some current from the charger, so I let it that way for another 2 minutes, and it's got to -5mA again. So definetly no charging here .
Normally, without charging, the consumption would be of about -513mA... -622mA... Same conditions : Wi-Fi on (~80% signal), Media volume on 1, lowest screen brightness, player just sitting there (in Star Legends).
I did tests with Asphalt 6 (no Wi-Fi, no active Internet connection), too. Same consumption... Same sh*t... I was thinking the Internet connection is what kills the incoming current the most (it turns out it hardly is).
So... Has anyone ever experienced something similar?! I really need an extension cord, lol.
----------------------------------------------------------------------------------------------------------------
I was wondering if a more powerful charger would solve this, but after reading THIS, I think there are hardly any chances...
I had another HAMA extension cord before. White, with double shielding, same lenght (1.8 meters)... Same current readings... I brought that one back to the store to get my $7 back, and here I am, 1 week later, having another one, in hope that the previous one was broken and this one is not. Haha...
So it's not the cord itself (bad company, lol), but the fact that there just is another connection the current has to go through...?!

Your tests are meaningless. Your phone does not draw more than 650mA no matter what charger you use. But it's possible the phone draws less if the extension cable somehow interferes.

oinkylicious said:
Your tests are meaningless. Your phone does not draw more than 650mA no matter what charger you use. But it's possible the phone draws less if the extension cable somehow interferes.
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It draws 900 mA (no extension cable) when the battery is nearly empty. As the battery fills up, the input current lowers...

Formhault said:
It draws 900 mA (no extension cable) when the battery is nearly empty
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No, it does not, no matter what Battery Monitor Widget tells you.

How can you be sure it only draws 650mA?
I tried to charge my old Desire with a 600mA charger and it wasn't full even after 6 hours!!! That was 7 months ago...

i was wondering about this as i dont have the orignal charger it came with but i hear its at 0.7amps, while some have 1.0amps, this link states below that the galaxy note charger is faster at 1.0amp,
http://forum.xda-developers.com/showthread.php?t=1329510

Formhault said:
How can you be sure it only draws 650mA?
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It's well documented in the forums and there's also video evidence

From my understanding, the Galaxy S 2 comes with a 0.7A charger (just like the Nexus S). If it comes with that, it means it only draws that much... Am I right?
All HTC's I've owned had a 1A charger. When I tried a 600mA charger I had at home, it barely charged the phone(s)...
So I'd say the input current limitation you've got doesn't affect HTC users (gladly). Still, there's no way to be sure about that, I can't find a similar video on YouTube, nor information regarding it...

What's that got to do with the I9100, which does have such a limitation no matter what charger you use?
Wow, reading fail on my part, you don't even have an I9100.
You're in the wrong forums, and this device is limited to 650mA.

i cant find alot of info about its amps
this guy states he got a 1amp charger with his SG2
http://forum.xda-developers.com/showpost.php?p=19210781&postcount=17
im using a .85A charger from my sony x8 and it chargers the same as my other wall charger
original battery charger with dock stand
http://www.trademe.co.nz/Browse/Listing.aspx?id=456123032
Input: 5.0V 500mA-700 mA
Output: 4.2V 450mA-600mA

oinkylicious said:
What's that got to do with the I9100, which does have such a limitation no matter what charger you use?
Wow, reading fail on my part, you don't even have an I9100.
You're in the wrong forums, and this device is limited to 650mA.
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It may be limited, okay, but then again, if my device draws +400mA from the charger if I use it when otherwise it would charge at ~+800, that means also your dual core big-screen device would do the same, too (but not at the same values). So if you take 650mA from the charger, I assume it would charge at maximum 250 if you use it (say browse the web etc.)
What does Battery Monitor Widget / CurrentWidget show you? Does it show actual current input or... it shows fake values?!

republicano said:
i cant find alot of info about its amps
this guy states he got a 1amp charger with his SG2
http://forum.xda-developers.com/showpost.php?p=19210781&postcount=17
im using a .85A charger from my sony x8 and it chargers the same as my other wall charger
original battery charger with dock stand
http://www.trademe.co.nz/Browse/Listing.aspx?id=456123032
Input: 5.0V 500mA-700 mA
Output: 4.2V 450mA-600mA
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When I heard you guys here on the forums saying that the SGS2 charges at only 650mA... I asked a friend of mine (only know one to own this device, sadly). I just gave him a phonecall and asked if his charger was of .6A or 1. He said 1. Also, his phone charges fast, in like 2 hours (he claims), so I'd say it really draws 1A... Otherwise it can't charge in only 2 hours...
He couldn't tell me what ROM he's using. I figured there's gotta be something modified in the kernel or something, but he has no idea what ROM he's got rolleyes:).
Sorry for the double post, I was expecting it to be automatically merged (which normally happens).

Couldn't care less about charging a HTC. Don't own one but I bet there are heaps of people that do in that forum.
Sent from my GT-I9100 using XDA App

On the topic of charging my S2 with other cables, I've noticed strange anomalies when using Blackberry chargers and USB cables with my S2. My touchscreen gets unresponsive until I unplug the Blackberry charger.
Has anyone noticed this?

rawr said:
On the topic of charging my S2 with other cables, I've noticed strange anomalies when using Blackberry chargers and USB cables with my S2. My touchscreen gets unresponsive until I unplug the Blackberry charger.
Has anyone noticed this?
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Yes. Not totally unresponsive but intermittent and sometimes to lockup until unplugged.
Sent from my GT-I9100 using XDA App

rawr said:
On the topic of charging my S2 with other cables, I've noticed strange anomalies when using Blackberry chargers and USB cables with my S2. My touchscreen gets unresponsive until I unplug the Blackberry charger.
Has anyone noticed this?
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That never happened to my HTC. I've used BlackBerry and Nokia cables, cables won't do anything.
I have a wall charger, which is claimed to be of 1A. It barely gives me +13mA, lol. It came in a pack with a car charger, which also was claimed to have 1A, and that one DID provide 1A 3 months ago when I tried it on my Desire (never tried it since then -- sold it now). When using the wall charger, the touchscreen would become unresponsive after 5 seconds. Unresponsive = touches itself, so-to-say.

aceofclubs said:
Couldn't care less about charging a HTC. Don't own one but I bet there are heaps of people that do in that forum.
Sent from my GT-I9100 using XDA App
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I just posted this topic in this forum too, because I figure there are more active S2 users than 3VO users... And I wanted to hear from you guys, how your phones behave in the same situations, too... Otherwise you imagine I wouldn't be here...
--
God damn it. I thought the posts get merged if you make a new post just after you've already done one...?! :/

5 Blinking Lights. Can't figure out what to do here....

Hey, guys and gals.
Well, I found a Nexus 7 in my car the other day and can't figure out who it belongs to. All I know is that I can't boot it up and can't charge it. All I get is 5 blinking white lights. I don't know what it means but I did some research and it seems to mean that the tablet is too dead to boot up. However, it's not accepting any charge even though I charged it overnight. All I am getting is 5 blinking lights now......before I at least got the screen turning on with an empty battery being shown. (If that makes sense)
I am not using the original charger as I don't have one and am instead using my kindle charger. Could that make a difference?
Also, there seems to be some damage around the charging port area...However, the port itself seems to be in adequate condition.
Any ideas?

If it is taking a charge it should warm up a little when it is on the charger.
No warmth == no current going in.
If the battery is so old that it is nearly dead/shorted, the tablet will get HOT when it is on the charger.
So no warmth means no battery connection, either at the USB port or at the battery connector inside the device. There are threads on here from folks who had units where the internal battery connector wasn't seated well and came loose - the teardown to that spot to seat the connector isn't too bad... search for them.
On a 2A charger it takes ~ 3-4 hrs for a 5-100% charge for a N7. That happens initially at about 1500 mA, so it is possible that the voltage on your charger simply collapses if it is only designed for say 500 MA... if that were the case no charging could occur, or only pathologically small amounts of charging could occur.
Also, the N7 has a TI charge controller chip which needs *some* small amount of juice to operate, so it is unfortunately possible for the battery voltage to get so low that the chip can't operate correctly and you get a chicken-and-egg situation where the battery can't charge, even though it is healthy - the voltage just got so low that the charging chip doesn't work. In these cases, an external charger with current limiting is needed to partly charge the tablet battery to get the voltage up high enough so it can be reconnected to the tablet and charged normally. Note that this is a 3rd scenario where you wouldn't feel any "charging warmth" even though all the connections are good.
There is a report on here of someone doing something incredibly stupid - getting some charge onto the tablet battery by disconnecting the battery connector from the tablet and directly connecting it to a car battery to charge it (That's a recipe for a battery explosion or fire). Please don't do something like that.
Something a little less stupid would be using a power resistor (e.g. 5 Watt, 30 ohms) in series with the car battery to prevent too much current from flowing. That would be safe even if the tablet battery was a dead short ( 413 mA, 5.1 Watts in the resistor ), and if the tablet battery was healthy-ish, it would trickle charge at ~ (12.4-3.0)/30 = 313 mA with 3 W dissipated in the resistor.
The important point here is that wall-wart USB chargers are designed to produce 5V up to a certain current level, but they don't actually control the amount of current; that's the job of the funky chicken-and-egg TI charging chip in the N7. So you can't just hook a 5v supply directly to the tablet battery - as you have removed the current limiting control you need something to replace that function: either something dumb to limit the current (such as a power resistor), or a slightly more advanced charger that allows you to limit the current output to a moderate maximum rate.
Note also you don't need to fully charge the battery this way; you just need to bring the charge up a few percent so it can be reconnected to the tablet and charged the "ordinary" way.
good luck

bostonbeast225 said:
Well, I found a Nexus 7 in my car the other day and can't figure out who it belongs to.
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Really? [emoji15][emoji41][emoji56]

bluebirch said:
Really? [emoji15][emoji41][emoji56]
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OP could be a cab or uber driver or something like that

Did u ever get this sorted