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USB not charging K750i |
MadBob
Joined: May 07, 2004
Posts: 179
From: Manchester
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I am using the USB lead supplied with the K750i at work and it is draining my phone instead of charging, it says charging when I first plug it in but after checking the power level keeps reducing, tested on all 3 of my work PCs
My phone charges ok on my home PC which is a USB hub built into my Monitor base.
This could be a problem if some USB ports don't work as I am getting an extendable USB lead for travelling, guess I will have to get a small travel charger too! |
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tomcoolj
Joined: Jul 05, 2003
Posts: 193
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Maybe you can only use 'High Powered' USB ports?
[addsig] |
mrbinks76
Joined: Jun 16, 2004
Posts: 75
From: Singapore
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I am getting the same issue. I bought a martin fields sync charger (USB) and realised it pulls down the battery level on my K750i instead of charging it.
First I tried on my notebook, then on straight from my PC USB port.
Finally I used an AC-to-USB adapter , which is a plug that sticks straight into the mains and you can stick in a USB cable for charging.
Same problem observed throughout.
Any comments by anyone?
Nokia 3xxx -> Ericsson T20 -> Nokia 6xxx -> SE T68i -> SE K700i -> SE K750i -> SE K800i |
LukeSky
Joined: Dec 22, 2001
Posts: 40
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this happened to me too. i think u can only charge it with high powered usb ports and maybe the power supply rating of your psu affects the ability to charge the phone via usb? |
anaadoul
Joined: Jul 24, 2005
Posts: 2
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i think this problem is due to using USB port which gives low power
max power given by USB is 500mA which is enough, but some PCs can provide only 250mA. this could be enough when your battery is new but after 2 or 3 monthes of usage, you would use abetter USB port. |
blackspot
Joined: Sep 06, 2004
Posts: > 500
From: Philippines
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One possibility is that those USB ports are USB 1 compliant only, which delivers low power -- not enough for charging.
resistance is futile. |
synagence
Joined: Aug 18, 2004
Posts: 114
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I've got the same issue...if my USB port and charge, power and run my iPod, charge my s700i why can't it charge the K750i
I've managed to get it to charge to about 90% but then it hovers around...
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dgilmartin
Joined: Aug 20, 2004
Posts: > 500
From: Dublin, Ireland Ph
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If mines at 100% in the morning and I go into work and upload some photos, and leave it plugged into the USB 2.0 socket all day, it has around 80% Charge. Its So Annoying! 
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Lucke
Joined: Jan 03, 2002
Posts: 52
From: Sweden
PM |
You need to install the K750/W800 drivers on the PC for USB charging to work properly! |
textappeal
Joined: Jun 18, 2005
Posts: 55
From: London, UK
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I can charge using my USB 2 hub on my PC. It takes a long time to charge even a few percent, though. |
MadBob
Joined: May 07, 2004
Posts: 179
From: Manchester
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Quote:
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On 2005-07-27 16:02:42, Lucke wrote:
You need to install the K750/W800 drivers on the PC for USB charging to work properly!
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I am completely at a loss as to why a software driver that simply points the OS at the cable should have anything to do with the power sent to that port? |
T-Shirt
Joined: Jul 09, 2003
Posts: 212
PM |
Greetings everyone...
My K750i (R1A044) is recharging its battery on USB cable, but not fully... around 80%.
My past MPx200's battery can be fully recharged on USB cable (100%), on the same USB port on my PC.
So, I guess problem is not on the USB port but rather to K750i's hardware / firmware... or else the problem of the K750i's USB cable.
CMIIW
Regards,
T-Shirt.
[addsig] |
Manuel_max
Joined: Apr 16, 2005
Posts: 386
From: 8 00 N, 66 00 W 912,050 sq km
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Quote:
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On 2005-07-26 17:27:04, MadBob wrote:
I am using the USB lead supplied with the K750i at work and it is draining my phone instead of charging, it says charging when I first plug it in but after checking the power level keeps reducing, tested on all 3 of my work PCs
My phone charges ok on my home PC which is a USB hub built into my Monitor base.
This could be a problem if some USB ports don't work as I am getting an extendable USB lead for travelling, guess I will have to get a small travel charger too!
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Mmmmm.........THAT I SURPRISE
--Sony Ericsson Evolution-- T610 > K700i > K800i > K750 >, k550i, w580i 1GB, W910i, k850i 4GB and C905 (MBW-150 Classic and Music) I  evolution |
dgilmartin
Joined: Aug 20, 2004
Posts: > 500
From: Dublin, Ireland Ph
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WHAT I SURPRISE? 
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max_wedge
Joined: Aug 29, 2004
Posts: > 500
From: Australia
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my only concern with usb charging is that it doesn't overcharge the battery - that could actually reduce the batteries lifecycle. Lithium battery chargers never overcharge or trickle charge the battery since that shortens the life cycle of lithium batteries. The cable doesn't have any charging circuit built in.
I guess if the phone is capable of stopping the battery from being charged once it is topped up, then it should be okay, otherwise in the absence of more info, I am only leaving mine on the lead when I'm actually using it (that way it discharges as fast or faster than it charges - hence not overcharging the battery)
Hopefully I am wrong and the battery won't be overcharged no matter how long it is left on the cable. I also remember the dss-25 (old style port) - which is designed not to charge the phone when cradled - so if SE have designed the cable for the K750 to allow charging, then there is a good chance it's okay. I'm still playing it safe for now.
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Posted: 2005-07-26 17:27
All the Way! Looking for a 
