Need battery assistance TF700T - Asus Transformer TF700

Let me keep this short and to the point. Battery pack is a C21-TF301 made up of two 3.7V Li-po battery cells.
I need to troubleshoot my tablets power problem further and I have the battery out. The connector has 8 pins. Pins are 2 red, 4 white, then 2 black. In that order, see below.
I can't find any diagrams. The pack is completely drained and the tablet won't take a charge from the wall, computer, or dock. The LED next to the power button has NEVER EVER come on since this started. Yes, I have troubleshot everything else so don't go there. *Sigh, yes the cable is good. LOL
I want to try stuffing some volts into this pack with hopes to get it all back together just to do more troubleshooting. I don't know if I need a new battery pack, motherboard, or ?
I had given this to my neighbor with disability and he loves it. He felt bad with thinking he had done something to break it, but I assured him he didn't. This is just what "sparky" things do sometimes.
I would like to get the tablet powered up so I could wipe the delvik battery cache and witness various power-on and power-off states with the charger plugged in. I'm just hoping to kick the tablet out of its coma mode.
BTW, I do have a wall charger that is 5V I am contemplating using it as a tool. If I can use it to individually bump the batteries I could do more. I just need diagrams.
Any help would be greatly appreciated.

Be very very careful charging a lithium battery pack with anything but the normal circuits. They store a lot of energy, and are easy to overheat and start a fire.
If you try it, do it outside on the sidewalk clear of anything flammable.
Ken
Sent from my XT1080 using XDA Free mobile app

kenryan said:
Be very very careful charging a lithium battery pack with anything but the normal circuits. They store a lot of energy, and are easy to overheat and start a fire.
If you try it, do it outside on the sidewalk clear of anything flammable.
Ken
Sent from my XT1080 using XDA Free mobile app
Click to expand...
Click to collapse
Rodger that.
Anyone got any advice if I should put 4v on red and black or 8v across both pairs of red and black? This is kinda what my main question pertains to.

Related

Battery too hot, phone wont charge?

Using the phone while tethered to my laptop.. i got a message stating the above.. Is there anyway around this ridiculousness? I remember the Touch Pro had this issue at first as well.
Phen0m said:
Using the phone while tethered to my laptop.. i got a message stating the above.. Is there anyway around this ridiculousness? I remember the Touch Pro had this issue at first as well.
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Click to collapse
First of all this is wrong section..
Second of all this is not ridiculous..this is how physics works...It is not the limitation of the phone, it is limitation of Lithium-Batteries...when charging and consuming a lot of energy like say with WIFI it causes Lithium batteries to heat up...at a certain point your phone stops charging to prevent the battery from exploding...this has been the same with ALL phones as long as they use Lithium batteries.
Solution: Put your phone on a metal platform..the metal platform will act as a heat sink and should alleviate the issue.
I remember there was a phone that was blowing up in peoples pockets when the battery came in contact with metal. Or was it the ipod touch?
But anyways you better give your phone a break too. Pull the battery for a minute and put it back in and Plug your evo in and let it charge off for like 15/20 minutes and then it should be ok to turn on. But if you wanna be safe just charge it while its off until its done
Sent from my HERO200 using XDA App

[Q] What about this solar charger?

Hi I was thinking about methods of keeping my Desire HD alive without downtime, and found this.
It claims it's 4000mAh, what are the chances that it really is?
http://www.ebay.co.uk/itm/4000mAh-Solar-Power-Battery-Mobile-iPhone-iPad-iPod-Android-Phone-Charger-/230801440245
Also found this one
http://www.ebay.co.uk/itm/Mini-USB-Devices-Universal-Solar-Battery-Charger-for-i-Phone-i-Pod-Android-Phon-/110901474863
I would just buy another battery, but I'm going to upgrade soon and I would like the keep the charger for the next phone.
Thanks
hmmm
MyCanSeeYou said:
Hi I was thinking about methods of keeping my Desire HD alive without downtime, and found this.
It claims it's 4000mAh, what are the chances that it really is?
http://www.ebay.co.uk/itm/4000mAh-Solar-Power-Battery-Mobile-iPhone-iPad-iPod-Android-Phone-Charger-/230801440245
Also found this one
http://www.ebay.co.uk/itm/Mini-USB-Devices-Universal-Solar-Battery-Charger-for-i-Phone-i-Pod-Android-Phon-/110901474863
I would just buy another battery, but I'm going to upgrade soon and I would like the keep the charger for the next phone.
Thanks
Click to expand...
Click to collapse
well, it all depends on what your after. are you looking to charge your phone by using this thing in the sun? in which case forget it. while the capacity is there, the PV panel that is on there wont charge the battery it's attached to for about 4 days in bright sunshine, it's simply not big enough.
if you're looking for just a portable battery to plug your phone into, then ok, it should do something like 3 full charges of an empty phone battery, before you have to plug it into usb to charge it up again
if you're looking to charge your phone only by using the sun (like going camping or something) have a look at this instead
http://www.ebay.co.uk/itm/5W-1A-5V-...neChargers&hash=item4ab9d45d50#ht_5401wt_1163
i have 2 of these and they are great, you get about 1200 mA @ 5VDC in bright sun and it chages almost as fast as plugin charger.
hope this helps
Neiko
neiko said:
well, it all depends on what your after. are you looking to charge your phone by using this thing in the sun? in which case forget it. while the capacity is there, the PV panel that is on there wont charge the battery it's attached to for about 4 days in bright sunshine, it's simply not big enough.
if you're looking for just a portable battery to plug your phone into, then ok, it should do something like 3 full charges of an empty phone battery, before you have to plug it into usb to charge it up again
if you're looking to charge your phone only by using the sun (like going camping or something) have a look at this instead
http://www.ebay.co.uk/itm/5W-1A-5V-...neChargers&hash=item4ab9d45d50#ht_5401wt_1163
i have 2 of these and they are great, you get about 1200 mA @ 5VDC in bright sun and it chages almost as fast as plugin charger.
hope this helps
Neiko
Click to expand...
Click to collapse
So does that work with the Desire HD?
Hi, thank you for your reply. Considering what you've said, I'll probably go with the one with the higher capacity, because I pretty much do want it for a portable charger. Thanks again
Sent from my Desire HD using xda app-developers app
Very nice!
I got a Primo portabable charger....it can charge the phone up from almost flat to full charge in 1.5hrs....which is the same as a wall output...and it can charge the DHD up to almost 7x before I need to recharge the charger.
is there a link for that primo battery?
nice idea
i will try it
I'm tempted to try it out.
:silly:Hm...
Notice your in the UK..
http://www.ebuyer.com/search?sort=price+ascending&q=powerocks&page=1
I got the Stone 3 a while back, works a treat..
this would be cool for hiking
alb0603 said:
this would be cool for hiking
Click to expand...
Click to collapse
Got a similar pack as relation gift. It is stated to be fully recharged on sunlight in 6-hours with full (summer) sunlight. In reality, it will probably be closer to 2 days to get a proper refill. Anyway, with some 3000-4000maH on board is is a nice emergency battery solution to have in your bag. Mine can be charged by normal electricity as well.

[Q] Should Incoming mA fluctuate? GF's phone charging extremelly slow

It's a JiaYu G2. Generally they are very well reviewed. Well, she's had the phone for about 10 days and all of a sudden it stopped charging regularly... It charges extremely slowly. Leaving it overnight for 8 hours charges it only about 30%.
Some of what we tried:
Had her do a power off and battery pull and restart
Charge while turned off
We checked the incoming mA via JiaYu's engineering menu (*#59#) and the incoming mA are fluctuating between 200-450. Is that normal? or should it be a more steady number?
Really really really hoping it's the charger and not the phone. Shipping the phone back and dealing with the Chinese on a customer service issue isn't my idea of a fun couple of weeks.
Ummm... Nobody knows if incoming mA fluctuates?
I have no idea, but have you tried another charger? If the source is really what's fluctuating, it sounds like a charger or other problem.
Maybe the battery is bad. You could try a different one, too. I have no idea if that would cause those symptoms, but you could Google it.
Sent from my SGH-T999 using xda app-developers app
Pennycake said:
I have no idea, but have you tried another charger? If the source is really what's fluctuating, it sounds like a charger or other problem.
Maybe the battery is bad. You could try a different one, too. I have no idea if that would cause those symptoms, but you could Google it.
Sent from my SGH-T999 using xda app-developers app
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Click to collapse
Thanks for your reply. We ordered another charger (from USA) and waiting for it to arrive. Her first language isn't English and she doesn't have transportation, so she's shy to go to an electronics shop.
Another battery would have to be ordered from China. She tested it out with an external charger and it seemed to charge much better than in the phone, but still quite slow... Not enough evidence either way to conclude if it's the battery because it's one of those multi-battery charges where the "pins" can be expanded to accomodate different batteries.... It hasn't been tested with a different battery, so not sure what "normal" charging time is with it.
The phone is only 10 days old...Really hoping it's not the phone... Dealing with Chinese companies on any sort of customer service issue is a nightmare.
What I was hoping was that someone knew about this... Regarding incoming mA from the wall charger... I don't know enough about it... Whether or not fluctuating from 200-500 is normal...
Anyone with a JiaYu G2 could test this out... Or anyone who has "live" mA data read capability through engineering mode or perhaps even "current widget" and can see if it fluctuates...
I'll check that out when I charge tonight if no one else gets back to you. It doesn't sound right to me since my wall charger does a pretty dead-on 2 hour charge at 1000mA, but perhaps it fluctuates and I don't notice (not my area).
Sent from my SGH-T999 using xda app-developers app
Unfortunately, I have discovered that neither my phone or tablet support monitoring incoming current levels.
One thing I thought of is that perhaps the phone is regulating current so that it is "fast" charging at 400mAh and then going down for the final bit. This seems to be an idea I've heard of before. 400mAh is still pretty low for a wall-charger, though - does it fluctuate all the time, or is there a pattern ? What is the charger *supposed* to proivide ?
I'm thinking about how charging from my computer's USB, it charges at a rate of 500mAh - and that will still charge to 100% in less than a night. Even if it was only drawing 200mAh all night, it should still be fully charged, definitely not just 30% (it would have to have an unheard of high capacity for that to make sense).
I don't know a lot about electricity, but I would wonder if the voltage is wrong or something, maybe ?
Hopefully someone who knows more about electricity will see this.
Sent from my Transformer TF101 using xda app-developers app
Pennycake said:
Unfortunately, I have discovered that neither my phone or tablet support monitoring incoming current levels.
One thing I thought of is that perhaps the phone is regulating current so that it is "fast" charging at 400mAh and then going down for the final bit. This seems to be an idea I've heard of before. 400mAh is still pretty low for a wall-charger, though - does it fluctuate all the time, or is there a pattern ? What is the charger *supposed* to proivide ?
I'm thinking about how charging from my computer's USB, it charges at a rate of 500mAh - and that will still charge to 100% in less than a night. Even if it was only drawing 200mAh all night, it should still be fully charged, definitely not just 30% (it would have to have an unheard of high capacity for that to make sense).
I don't know a lot about electricity, but I would wonder if the voltage is wrong or something, maybe ?
Hopefully someone who knows more about electricity will see this.
Sent from my Transformer TF101 using xda app-developers app
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Click to collapse
The wall charger is rated for 500mA output... It's within seconds... I don't mean staying steady and then changing at the end.
I really need another battery and a charger. The charger should be arriving within a few days, so we should be to eliminate that as the issue, but if it doesn't fix the issue, still won't know if it's the battery or the phone.
I have a sneaking suspicion it's the phone... but hoping to here some good news here that fluctuating between 250-450 is NOT normal, thus likely the charger... But as you mentioned, even if left at 200 it still should fully charge overnight... Unless the fluctuating is causing the battery to not accept the charge properly... I don't know
What a pain in the ass. I guess there's something to be said for buying local.

Battery died....replacement ideas...

I've just joined the dead battery club with my 6800 tab..
won't charge at all.even stock charger no icon nothing....
been on charge all night and have tried numerous things no response.
haven't bricked it went flashing anything just have been busy
Lately haven't used it and must have drained flat.have read before
once they get flat they won't charge as need a small amount of power
From battery to activate charging circuits.
What's the best battery to put into it? Stock one on ebay for 24 usd
Just thought I would ask but is there a bigger capacity one that would fit?
Anybody done this before just looking for ideas..
i will take the battery out and try charging it with a 3.8v mobile
Charger or camera charger by using some wires if any success will
Post up if works...thinking got to put small charge into it then can use wall
Charger.
Well ordered a new battery from eBay 28 bucks delivered...
Just decided to open it up and play with it tonight and got it charging now with the old battery.will let it charge for ages before turn on.new battery still in mail.
Got it working by unplugging the battery for a while and reconnecting to wall charger.note before doing this it would not charge no matter what I used..eg 2 amps etc
Not sure why it works but read it somewhere and worked for me too.
Tab seems to work sometimes and charges ok with old battery then later i turn it on and nothing..
wont wake up even with wall charger plugged in.never had problems with deep sleep before,
maybe a couple of roms ages ago but the one im currently using hasnt done it before and been
using it for ages.im guessing its the battery playing up.anyway got my new one in mail today
and then tab wouldnt start again and i know its not that flat.I decided to change the battery and are
charging now will leave it on charge for ages till full before turning it on.
Do i have to now delete the battery stats?
thanks..
My P6800 is also dead. Won't charge, whatever plug I try
Just ordered a replacement battery + tools for opening the device. Hopefully that will fix things.
I had very similar problems to MRBR7. I was about to order a new battery, but they were over $60 on ebay at the time. I ended up just buying a new tablet - a Nexus 7 2013 - rather than putting money into the old one.
However, I decided to experiment with the GT 7.7, so I took it apart, popped out the battery and hooked it up to a specialized charger than I have to remote control cars/planes/copters. The charger "conditions" LiPo batteries - discharging them and then balanced charging them back up. That worked. After the special charger did its thing I put the battery back in the GT 7.7 and it was happy.
Since then, though, I've had several mysterious and spontaneous reboots. I'm thinking of putting the stock ROM back on it to see if that will stabilize it.
Another weird issue is that the tablet doesn't seem to track how much battery power is left very well. It can drop 10-20% in a few minutes. I know it's not really dropping, but it is certainly weird. Now that the batteries are cheaper on ebay I may order one and replace it.
Edit: Update:
I did put the stock ICS back on my 7.7. It has been behaving nicely since then. No crashes. No reboots. No funny battery behavior. So I think I'll just leave it like that. Putting Nova Launcher on it meets most of my needs for customization, so I'm happy with it.
My tab is dead again. Don't know what happened. I'll try disconnecting the battery from the tab and connect it again, and then try to charge it. It won't charge now what ever charger I try.
If it doesn't work, I might go for the nexus 9
Sent from my LG-D802 using Tapatalk
vikdal said:
My tab is dead again. Don't know what happened. I'll try disconnecting the battery from the tab and connect it again, and then try to charge it. It won't charge now what ever charger I try.
If it doesn't work, I might go for the nexus 9
Sent from my LG-D802 using Tapatalk
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Click to collapse
I have a new battery that I am about to put on eBay, but it probably depends on where you are located as to whether it is worth your while. I am in the UK.
rebski said:
I have a new battery that I am about to put on eBay, but it probably depends on where you are located as to whether it is worth your while. I am in the UK.
Click to expand...
Click to collapse
I live in Norway, so that's doable. The one I ordered on eBay took around 5 weeks to arrive...
That being said, I don't know if I will invest more in this tablet if it just keeps on destroying batteries. If I get it back up and running again I might try the stock ROM to check for battery drain.
Sent from my LG-D802 using Tapatalk
My tab is back from the dead (again). All it needed was a little bit of power-love from the original ac adapter. Still using the replacement battery.
I've flashed it with cm11 and it runs great.
Sent from my LG-D802 using Tapatalk
Dear all,
My 7.7 battery was dead, too. Ordered the battery replacement online but not able to open the case to replace the battery.
Tried to use the use the prying tool, pry the silver binding from around tablet from glass edge but still cannot open it even the plastic prying tool was broken.:crying:
Is there any tips or guide that can share,please?
Thanks so much

Maxx hd won't charge

Quick history on this phone...
This is my former Razr Maxx Hd, my wife is using it. It is unlocked and rooted.
My wife has been complaining about the phone just dying on her with 50-75% battery remaining. So Thursday I started to look at it and realized that the back was bulging out. She also had an HD Maxx that she dropped in the water, I took the battery out of hers and put it in mine, everything was working fine, until this morning. The battery icon shows that the phone is being charged but the circle widget doesn't, and when I click on the battery widget the battery app, indicates that it's not charging. Other than a factory reset what else can I do, to try and make this thing work. I have tried different cables and chargers all with the same result.
Thanks for your time.
Josh
Sent from my XT1254 using XDA Free mobile app
I see two possibilities here with massively different causes.
First, it may actually be charging, but some or all programs aren't aware of that fact.
Second, it may not be charging at all.
I can't think of a simple way to test which is the case, without running the risk of leaving you with a discharged battery and no way to charge it.
As additional information, when you turn the power off and plug in the charger, does it load the simple battery indicator screen and/or show any evidence that the battery is accepting a charge?
Sorry for not responding, I found the cause to be a bad battery. When I would plug the phone up without it powered on the battery icon would display a question mark inside it. I thought that maybe I had a bad flash so I made a factory cable and was able to reflash the fxz. That didn't help though, so I purchased a new battery from eBay, and it works flawlessly.
Thank you though for replying
Josh
Sent from my XT1254 using XDA Free mobile app

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