Charging circuit questions - 8125, K-JAM, P4300, MDA Vario General

I have a MDA that had it's battery die durring a reflash. Yes I know me=dumbass. I have since jumpstarted the battery and the phone will boot to the recovery screen.
This is a phone I got off craigslist cheep for my son...to break him into the winmo cell phones. I know I could just buy another battery but I really dont want to throw more money into this. Plus the wife is pissed that I may have bought a junk phone.
Unfortunatly I am unable to charge the battery enough to complete a full reflash without the battery running out of juice.
If a phone has no "OS" installed on it, will it still be able to recharge a battery? If it has no drivers...will it know it has a recharging circuit?
I am trying to charge the batt unsing the usb cable and taping the red/black to +/- respectively. Will thgis eventually charge the batt? Or are the charge points different than the +/- as marked on the battery?
Any help is apreciated.

Yes, I think what you've done will eventually charge the battery.
It may take while since USB is only 500mA.
Does the charge indicator illuminate orange when you plug in the phone? If so, that means it is charging the battery.
I'm not sure if it will charge with no OS or not. Sometimes a weak (~800mA) charger requires the phone to be able to boot before it will charge. Phones that are more dead usually require the OEM 1200mA charger.

ur mobile will charge without an OS...the Orange Led should glow even if the phone is switched off...but charging thru USB may be inadequate...use wall charger....

Related

It's dead!

My battery went flat and I can't find my mains charger, so I connected it to my laptop using the usb cable, with the intention of recharging it. But it doesn't seem to be charging and I can't turn it on at all. Is that normal? Will it only recharge from a mains charger when the battery's dead? Finally, is it safe to by any odd charger off ebay etc.?
I do not know if that is normal or not. However with regards to charging, I have used a Motorola charger with USB connection successfully in the car and from the mains.
If it is all the way dead, you have to charge with original charger. USB charge will not work. Nor will a Motorola charger work. I think that as long as the charger is 5volts, you should be okay. My Motorola charger is like 3v or something.
Thanks
I had the same problem. It does not charge in the beginning, however, if you leave it connected to USB, it will start charging in an hour or so. damn long, but it's better than nothing...
Tried to keep it connected via usb for a few hours, no luck, guess I'll just have to wait till I've bought another mains charger. There seem to be plenty of cheaper ones on ebay etc., is it safe to buy any usb charger?
This happened to me, and I nearly had a heart-attack until I came to these forums for a solution. Apparently, the phone has to be on for the charger (mains or usb) to actually charge the phone. This is because the operating system of the phone controls the charging of the phone. If the battery is completely dead, the operating system cannot control the charging, and so no matter what kind of charger you use, and no matter how long you leave it plugged in, you won't be able to charge the battery.
The only way to get it to work is to get a bit of charge into the battery directly - not through the phone. In other words, you need to jump start the battery (almost like you would jump start a car's battery). What I did was take the battery to a phone repair shop, and asked them to boost the battery using boosting equipment. Their battery testing equipment will be able to tell you when there's sufficient charge to get it going. Then turn on the phone and plug in the charger immediately once it's booted up (in other words, when the operating system can kick in and start controlling the charging process).
Hope this helps.
PS, there's a post on this forum somewhere on how to do-it-yourself, but in the long run, I found my way to be the easier way.
PPS. Once your phone is back up and running, never let the battery run down completely.
Same happens to Motorola V3.
It is ridiculous design flaw.
This is really annoying, I was hoping to sort this out with a new charger (in the post now) but looks like I'm going to have to go to a t-mobile shop. Will they definitely have something to charge the battery a bit, or should I start looking into buying something to charge the battery at home?
Yes you need the main charger.
I was using my other phones charger(motorola) with my cingular 8125 and battery is completly empty it doesn't charge it.
Didn't wait for a hour but if that works.It's good i love my wizard
motorola V3 chargers do work. used the missus' when battery ws completely dead. interestingly, doesnt work the other way around...... :?:
help with my dead battery
Bdcol
Could you direct me to that post on how to charge a dead battery - I have searched but can't find it. This is a really annoying problem - does anyone know of a commercially available battery charger which doesn't need the phone OS (the battery looks pretty standard to me).
Many thanks
Chris

i-mate JAMin battery problem

I've left my JAMin for a month and now I can not turn it on.Any ideas? Why the battery is not charging? I think I'm going insane Do I have to buy a new battery? PLEASE HELP ME
If you are trying to charge using usb from computer or other source it probably won't revive a really discharged phone.
Instead you need to use the wall charger, leave it plugged in overnight then check the phone out.
Mike
Batt Charging is controlled by the OS/ROM, so if the batt is completely dead the phone in all probability not charge it.
You may not need to buy a new Batt if you can find a seperate batt. charging unit....
Else, a new batterry.
10x guys.I hope I will charge it today Hope dies last
happen to me before, if you can't charge it up, you either have buy a standalone battery charger from ebay or just postive & negative to boose a charge into the battery (for pros only)

charging problem

Today I had pluged my usb cable in my cell and when I unplug the cable my battery was 30% charged but as soon I unplug the usb cable i got battery low warning and suddenly my cell shutdown. When I start the cell it shows -1% battery and now if I chrage the battery from charger it wont showing charging (animated charging bar) but its actualy charging it very slowly but now if I again plug usb cable and unplug it the cell again shutdown instantly.
I have tried different pcs and cable but the problem still there. Should I hard reset it? I dont install new software or change any settings durring the day.
If there isn't any important data on the phone,yes , you can try the Hard reset,but most probably the cause for not charging, is something else and not the rom (OS),so Hard reseting will not boost up the charging.If the device is not charging ,its rather more of a Hardware issue than a Software. Try to charge with a Wall charger (Mains),if it charges normally,then the fault lies in the usb cable,it might be faulty or try with other usb input port on the pc,but if it still doesn't charge with the Wall charger,than most probably the mini usb port of the phone is faulty or damaged or it might be that the battery is giving upon you.Confirm and check all these options.
I have already tried the external (home) charger and different usb cable and pc.
I cant hardreset as the battery is lower then 50% charged.
Just for your knowledge that the active sync is working fine and ithink mini usb port is not totaly dead,
And the orange light on top is keep blinking when I have plugeed usb cable.
And battery status show +21mA and +68mW only. What it should be?
BTW battery status icon bar keep animating while I have pluged usb cable. does it mean its charging.
Also let you know that this morning my battery last to below 10% charged and after that the problem starts.
And after pluging usb cable for few minutes if i do softreset then after reboot the system shows few % battery charged ( around 10%) but its drains very fast (in 2-5 minutes).
azfar said:
BTW battery status icon bar keep animating while I have pluged usb cable. does it mean its charging.
Also let you know that this morning my battery last to below 10% charged and after that the problem starts.
And after pluging usb cable for few minutes if i do softreset then after reboot the system shows few % battery charged ( around 10%) but its drains very fast (in 2-5 minutes).
Click to expand...
Click to collapse
Ah !
So it has gone below the retention charge, required to start the charging circuit ,thats why its not charging.
Now either try to charge with a wall charger capable of out put of 1.0 amp or you need to 'Jump' start the battery.
i dont understand can you explain it a bit more.
This it what he's trying to say:
The battery has a well-documented bug. If you drain it below a certain amount (around 5% IIRC) then it can ONLY be charged from a wall charger, regardless what else the phone says or does. Your symptoms are weirder than usual, but not too surprising.
Replacement batteries are cheap and readily available. Start shopping for a new one while you leave the phone on the wall charger for at least 6 hours, with the phone OFF. This is a last-ditch attempt to recover your battery. If it still misbehaves after that, it's probably toast.
Thanks for explanation.
does the usb cable hack work (connect the red and black cables to battery + and -)?
azfar said:
Thanks for explanation.
does the usb cable hack work (connect the red and black cables to battery + and -)?
Click to expand...
Click to collapse
YUP !
Thats what is 'Jump' start.If the battery is only below the retention charge,it can be very easily recouped by this trick.If it works fine,otherwise get a new battery,many have recovered their batteries by Jump start.
Check out this link :-
http://forum.xda-developers.com/showthread.php?t=374108
thanks for the link.
OK jump start do the trick (charged the battery) but my phone is still draining the battery very quickly (around 1% a minute) and I havent check the home charger or usb cable charging.
azfar said:
OK jump start do the trick (charged the battery) but my phone is still draining the battery very quickly (around 1% a minute) and I havent check the home charger or usb cable charging.
Click to expand...
Click to collapse
ok,good if it has started to charge,now don't ever let it fall below atleast 30%,how did you charged it if not through home charger or usb cable,get the battery fully cgarged with home mains charger and then check the drainage of the battery.
Secondly,either the battery cells have gone weak and not retaining the charge for long or you are using GPRS more often,coz it drains the battery quite rapidly.it all depends on your usage.
I just charged the battery from naked usb cable and it charged it but the battery drainage problem still presist and if I charge the battery from usb or charger the os dosent shows it charging. I think i should look for new battery.
Can you explain me what kind of battery should i choose for wizard as here too many local batteries are available and I dont know about correct specs for battery like mah, mwh, volt, etc and kindly also let me know I also doubt on my home charger what kind of charger should I get (mah, mwh, volt, amp)?
BTW I dont fully charge (100%) the battery yet, do i still need a one full charge and I also dont shock the battery by 1amp charger aswell.
azfar said:
I just charged the battery from naked usb cable and it charged it but the battery drainage problem still presist and if I charge the battery from usb or charger the os dosent shows it charging. I think i should look for new battery.
Can you explain me what kind of battery should i choose for wizard as here too many local batteries are available and I dont know about correct specs for battery like mah, mwh, volt, etc and kindly also let me know I also doubt on my home charger what kind of charger should I get (mah, mwh, volt, amp)?
BTW I dont fully charge (100%) the battery yet, do i still need a one full charge and I also dont shock the battery by 1amp charger aswell.
Click to expand...
Click to collapse
Yes ! you must first fully charge the battery and than check the drainage.
Secondly I can't recommend any specific battery,check the specifications on the battery and verify it.
If the home charger is doubtful,you shud get an original PDA phone charger capable of 1.00 amp out put.
ok I also don't able to installnew rom on it, its giving me erorr that phone is not connected to usb cable etc.
Now the active sync is not bieng connecting too and I think now my mini usb port is faulty is it repairable?
azfar said:
Now the active sync is not bieng connecting too and I think now my mini usb port is faulty is it repairable?
Click to expand...
Click to collapse
Yes it is repairable or replaceable for that you'll have to contact the cellular company from whom you bought the phone,if its still under warranty. Otherwise get it repaired from any mobile repair shop.
ok may I know from where you belong?
azfar said:
ok may I know from where you belong?
Click to expand...
Click to collapse
Don't you see my country flag on my posts and my city of residence is also mentioned there
hmm I see.

help

so i was using my phone like normal then all of a sudden it turned off. now evey time i try to turn it on it just turns itself off when it gets to the tmbile screen.... what do i do.
check for bent battery pins, if not that, take out the battery, plug in usb cable on wall charger not pc, and then insert the battery. it should try to charge without trying to start the phone. Let it charge for a few hours.
ok got it to turn on. but when i charge it the battery doesnt take a charge. i have the symbol and light but it isnt going up. as soon as i pull the cable it turns off. i think it might be the battery or a crappy charger. it isnt the stock one. also before this happened the charger would take forever to charge. on my buddies charger it would take about an hour for a full charge.... this is frustrating
ah yea, cheap charger, ive read where they seem to cause dodgy batteries. Does the charge light flash orange and green?
no steady orange
In my experience with HTC products, you HAVE to use either the stock charger or one that puts out 1 amp of current. Most 3rd part chargers put out like 500mA which is enough to charge the battery, just terrible slowly which reduces its overall life. Its just like if you exclusively use a USB port on your PC to charge your phone, it takes forever, and it will decrease battery life.

[Question] - If the phone is in MAGLDR Menu and Usb is connected to the power?

Shouldn't the orange light be on?
Also if the phone is off shouldn't the orange light be also on?
(with the power charge usb on)
When in MAGLDR you will NOT see the power led.
If you let your phone totally die and can't start it boot to MADLDR and let it sit for 10-15 minutes to charge first.
Couldn't tell you about the last question. If USB is plugged in on my HD2 the phone will not power off, only reboot.
I will try to answer your last question with my HD2 running XBmod. When the phone is off and I connect it to charger, it will turn on at once, and then charge. It's not likely that with magldr you can charge the phone while it's off.
Somebody says in another thread which I cannot remember, that magldr does not allow turn-off-charging. Please correct me if I mess something here.
Hello,
Well it seems that my phone USB port is a bit loose or something like that..
Since the cable only charges it in a certain position.
Also I used a usb cable from a an LG phone and it's not good at all...
Didn't charge the battery, and yes the light of charge is on...
Like in the car when I plug it, the charging is almost nothing...
This also happens with usb charge on the pc...
But this is what I notice...
I'm not using the usb cable from htc.
The USB cable can be important regarding to charge. I have a Nokia Micro USB cable and another one just standard and nameless, maybe from BlackBerry og Samsung.
The nokia one with my HTC charger giver only around 50 mah when charging, observed by using HTC Battery Tool. It takes a whole night to charge battery full, and some times even still not full when I get up on the morning. And if I use the phone while charging, Battery Tool even shows that my phone is consuming battery.
The nameless one charge my phone with 500-800 mah and it takes exactly 2 hours to charge a battery from 30% remaining power to full. So I never use the Nokia one to charge my phone.
Need to install that Battery tool!
I had a similar issue, I cant be bothered pulling the cable apart but I suspect that a generic 2 wire usb "charging" cable wont cut the mustard, it possibly needs to be a 4 wire connection, all be it it only needs two of them to charge
as for your other questions, its all to do with MAGLDR
if the phone is OFF and you plug it in it "should" charge yes, but it wont if you have MAGLDR installed
If the phone is in MAGLDR or the bootloader for that matter, it will charge, all be it the light wont come on.
what isn't clear is if in bootloader or MAGLDR the device is capable of autocut off, ie, turning the charge to trickle charge once full, so my advice is that when charging in bootloader or magldr, only do it for 20 min or so then boot to your OS and continue the charge from there.
Well I now have adocking station to recharge the battery, got also a new battery...
The battery recharging is solved...
But the usb on my phone is ****ed up... since I need to "bend" the phone a bit for the light to turn on, but it only charges at Battery Current 250 - 300....
Ah well it's not a perfect world...
It sucks a bit that WP7 consumes the battery so fast...
mOrrI said:
Well I now have adocking station to recharge the battery, got also a new battery...
The battery recharging is solved...
But the usb on my phone is ****ed up... since I need to "bend" the phone a bit for the light to turn on, but it only charges at Battery Current 250 - 300....
Ah well it's not a perfect world...
It sucks a bit that WP7 consumes the battery so fast...
Click to expand...
Click to collapse
Just don't bend it anymore or the USB will fall off the board. Data connection may become impossible to repair depending on the damage. And you will have yourself a permanent windows phone.

Categories

Resources