USB power supply - 8125, K-JAM, P4300, MDA Vario General

I am using the Cingular 8125, which I think is the same as the Wizard. Since I travel frequently I thought I could buy one of those USB power adapters (with a USB connection) and recharge my 8125 through the included USB cable. This works fine with my PC. A strange thing happened: the battery indicator told me the battery was charging. the 8125 had about 50% left when I hooked it up, and when I checked later after I disconnected it, it said 87%. However, this number went down in fron of my eyes, about 1% a second until it stabilized at around 45%. I think, the chrager did not work at all! Does anybody know what the requirements for a USB charger are to work? The one I have says 5V, 300 mA. I figure that may be too small, since the charger that came with the device says 5V, 1A. Or is there anything that would prevent the device from charging with a non-HTC charger?

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USB charging

My new M3100 is great, apart from one thing. I seem unable to charge it using any of the three in-car adapters I have that worked a treat with my Prophet.
Anyone know if this is an issue, or just specific to my M3100 (which appears to not be charging properly even when on USB or mains adapter)?
Cheers,
Sam
i have tried 2 different USB car chargers and neither have worked. Last one was 1A but still no joy.
Did you drain up the batt? I mean, was it full discharged when you attemped to recharge it? I have the same problem, no way to recharge it, at least the orange light doesn't show up.
If i try it at home, no prob. But what with a usb? no way
There are issues with some car charger USB connections.
I do not suffer this problem because I find it very useful to have an "inverter" permanently in the car. For those that have not seen these, it is a device that converts the battery voltage to mains supply voltage. This allows you to plug in as if you were at home. Handy for your hermes, laptop, phone etc etc without the hassle of special in car setups - just plug in with your normal mains plug. Most of these devices just plug into your cigarette lighter socket, although I have mine permanently wired in - so I also have the socket still available.
here is a UK example but I imagine they are available for all countries:
http://www.caravantechnology.com/pr...&selection=1&gclid=CMn-1fXq1YoCFR2UEAodLSvYLw
There is a known issue on car charging where the device will only charge when switched off. If this is your problem see the wiki here or my link below.
http://michael channon
Mike
I've had that problem too. Strangely enough, restarting my 8525 gets the car charger to start working
try powering off your unit, it will get the orange light. Turn it back on after 5 mins and the charging will hold. not sure why.
I was having the same problem as mentioned above with a usb car charger that came with my GPS, however I just received my car charger from HTC FINALLY! With the HTC car charger and home charger, I have no issues charging the Hermes where I sometimes run into problems with say a generic motorola or igo power adapter - these sometimes require me to restart my device before charging begins.
By the way, I am going on a trip where I'll be away from power for 4 days ... can anyone recommed a portable cell phone charger that runs either off of AA batteries or solar power?
I think there is another thread about this somewhere, but I don't have time to look it up. I've had this same problem with several chargers that worked fine on my Cingular 8125 (HTC Wizard). History is that there is a firmware issue on the TyTN that checks for a data pin in the USB interface coming from the charger, and if it doesn't have the right voltage on it, the phone doesn't charge. When you totally power down the device (holding down power button for a while and then hitting yes to the power down question), then the charger works. It's when the device is in standby that it doesn't work right, because the firmware checks for the pin to be correct, doesn't find it, and disables the charging circuitry.

Charging via USB Charger

I am on the road a lot and don't want to be carrying the HTC charger with me. For my Treo, I had a foldable USB AC adapter (.8A and 5V) to which I plugged in a Sync and Charge cable and it did just fine.
After reading all the comments about there being two ways to charge a Tilt - fast and slow, I decided to test out a retractable USB data cable with my USB AC brick. I set the option in Power to "Not charge the battery when connected to the PC." and plugged it in. Nothing. I then unticked the box and sure enough, it started to charge. As I was at 70% of the charge, I expected this to drag on, but it didn't. It took about 1 hour and was fully charged.
I'm still a bit worried about charging this way - the description of the Lil Sync cable for the Tilt says that while it might work, under certain circumstances it won't if your battery is below 30% of a charge. Has anyone seen this happen? The last thing I want is to go away for a few days and be stuck with a dead batttery.
Do I need to pick up a special cable from ppctechs or boxwave just to charge? Should I just carry the supplied charger?
I always charge my kaiser just using the sync cable and it works fine even from a flat battery. there seems to be absolutely no need to carry an AC adapter around when you can just connect it to a computer to charge.
Thanks Spooki. Just curious - how long does a charge usually take when you charge against a computer's USB?
it seems to take roughly twice as long as a wall charger but i work with PC's all day so doesn't really bother me, much easier than carrying a charger around.

Wizard not working -- battery or phone???

Hi everyone!
I have just recently acquired an old imate k-jam that was not working
I managed to resurrect it for a wile by connecting 5v to the battery for a minute and then it was working for bout half a day and ten it just stopped working.
Now i need to use a 9v batter to get it to start and after 2mins it will just stop and the battery will be at 0v again.
Now do you guys think this is my battery being stuffed or is it the phone?
Stupid Question:
Is this the only way you're charging the battery? =-O
The connection wires to the battery is an "emergency jump start only" procedure. It's only used because the Wizard won't charge unless it can first boot.
You should connect your Wizard to a charging source as soon as (or before) it boots.
The AC wall charger is the best. Lacking that, use a USB cable that fits or a car charger, if you have one. The USB / car charger methods will take many hours longer. Also, avoid using the Wizard while it's charging. Just let it charge until the LED goes from orange to green. THEN if you get just a couple of minutes, it's new battery time.
If the Wizard boots, it's very unlikely that it's the Wizard/k-jam.
My Brother-in-law gave me his "old" Cingular 8125 when he "upgraded his phone", he said it was "too heavy and clunky and hard to use". Battery was deader than the proverbial doornail. After the "jump start", it took a full 8 hours of charging via the car charger and computer USB cable to get it to green. (He left the wall charger in South America somewhere.) The battery has been working fine for the last 8 months.

JASJAR charging time

Hi. Got my hands on slightly used JASJAR and I was just wondering how long does it usually need to fully charge using USB and wall charger.
I left it overnight on the wall charger (which I doubt is an genuine one) and for 6-7 hours it charged to about 60-70%. The second time I connected it on my desktop USB 2.0 port but the result was same.
The battery seems to last OK, there are no sudden dropdowns etc. The device is freshly formated, flashed with TML WWE 6.1 (D.08.20) no applications installed etc.
Here is the pic of the wall / travel charger
Welcome to forums
Charging time may vary from original charger to another one.
Normally I left my Uni to charge before I go to sleep and when wake up is fully charged, and last me 28hr aprox.
USB charging I read somewhere it´s not recommended as shortens battery life (not sure if this is actually true but I have USB charging disabled)
Enjoy your great Uni!!
Thanks for replying.
What do you mean disable USB charging. Is there some other way to charge this thing? All I can see is the mini usb port on the back
I reflashed Tomal 8.9 and I bought the USB to mini USB with two USB A plugs that go in the PC. It is supposed to provide 1000 mAH and it kind of charges faster now.
Oh btw, I checked the battery and its not OEM battery, maybe replacement I don't know, but it works ok.
1590 mAH 3.7v
I was going to say in your original picture (charger) is only 500mA. The original Uni charger is 1A (1000mA). To 'fast-charge', you need the 1A charger, which I see you now have, so that's alrighty!
Yup it sorted out. Great device btw.

Won't charge from computer?

Anyone else notice that it won't charge from a computer? (well monitor) With my Aria i ran a USB cable from my monitor at work to the phone. the monitor wasn't connected (USB) to the computer, and it would just work as a charger. Doesn't seem to work with the atrix. anyone else able to confirm?
more info. does in fact charge when connected to a computer. but due to security reasons the company does not want phones connected to the companies. That is why i was using the monitor. Going to have to look into why it doesn't work this way for this phone. or just buy a longer cable and use the wall plug.
Mines actually not charging when connected to my laptop, wall is fine. The phone recognizes that it has a usb connected, but it doesn't charge and battery state still reads as discharging.
Also wondering if this is an issue for anyone else
Mine charged extremely slow from my PC and my laptop, the wall charger does it much faster.
USB ports on a computer don't usually provide enough voltage to charge a phone as fast as they normally do when plugged into the wall. My motherboard actually has a piece of software that supposedly enables phones to charge faster when connected to a USB port, but i have yet to try such a feature.
I've had my Atrix plugged into my computer for roughly 3 hours now, and so far it's gone from 30% to 60%.
I wouldn't be the least bit concerned if it was charging slowly, it was actually lower after unplugging than it was when I plugged in, and no charge symbols appeared. But if I plugged it in the computer saw it and soon as I unplugged the message popped up saying low battery please reconnect charger, and when reconnected it went away.
But there was no charge symbol and under battery status it said discharging.
Now I just unplugged from wall charger (worked fine first time) and plugged back into laptop, its charging fine so hopefully it was a one time thing.
Ah, so thata what it is; I have had mine on here for a while now and im still at 60.
Rooted/ROM Captivate
Rooted Atrix
When i first plugged mine into my desktop computer, it wouldn't charge at all. I then installed that motosoftware that came with the phone and after it finished the phone started to charge, but very very slowly.
Every computer ive tried works fine.
But when i plug it into a wall charger(not one that came with atrix) it starts freaking out lol. "unplug to save energy!!" flash on & off 3/second...atrix charger works fine tho...lame
You need the driver off the motorola site to charge the phone from your computer.
Yea, computers work, monitors don't. I'm guessing that the USB hubs in monitors don't have enough juice, even though they did for my Aria.

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