a friend has asked me to take a look at his TF201 which he had in storage for 2+ years and wants it usable again, I started charging it with the supplied cable using my Anker 40W 5-port charger (he doesn't have the wall plug for it). I did a bit of reading around and an orange light is supposed to come on at the power button but nothing shows, not even a blinking light. I'm charging directly to the tablet, not the dock.
After an hour of charging, pressing the power button vibrates the tablet with a red battery gauge on the display and then switches off. After another hour of charging the tablet boots, with 2% battery remaining in a "not charging" state. So, I leave it charging overnight and it's now at 90%, still stating it's "not charging" in Settings > Battery.
What does the problem point to it being?
Salty Wagyu said:
a friend has asked me to take a look at his TF201 which he had in storage for 2+ years and wants it usable again, I started charging it with the supplied cable using my Anker 40W 5-port charger (he doesn't have the wall plug for it). I did a bit of reading around and an orange light is supposed to come on at the power button but nothing shows, not even a blinking light. I'm charging directly to the tablet, not the dock.
After an hour of charging, pressing the power button vibrates the tablet with a red battery gauge on the display and then switches off. After another hour of charging the tablet boots, with 2% battery remaining in a "not charging" state. So, I leave it charging overnight and it's now at 90%, still stating it's "not charging" in Settings > Battery.
What does the problem point to it being?
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Click to collapse
I would try to find an original Asus charging block on eBay or Amazon, I just picked up on eBay with a cable for $10 so don't overpay.
NP
Ok thanks will try that.
I've also found the dock doesn't take a charge at all (it blinks orange for a few secs then stops), probably needs a new battery. Is it worth buying a new cable and battery at this time, as dock batteries seem quite rare/overpriced compared to a used TF201 tablet from ebay.
Yeah some people are asking crazy prices for the doc +$300 US. You don't really need the dock, I bought one new with the TF201, I'm now using it with my TF700. With that being said, if you can get one cheap, that holds the charge get it, the USB port is great for flash drives or a USB mouse and the SD slot on the front is a nice addition. Remember you can also search for AD01 as that is the Asus model number for the dock.
NP
Salty Wagyu said:
a friend has asked me to take a look at his TF201 which he had in storage for 2+ years and wants it usable again, I started charging it with the supplied cable using my Anker 40W 5-port charger (he doesn't have the wall plug for it). I did a bit of reading around and an orange light is supposed to come on at the power button but nothing shows, not even a blinking light. I'm charging directly to the tablet, not the dock.
After an hour of charging, pressing the power button vibrates the tablet with a red battery gauge on the display and then switches off. After another hour of charging the tablet boots, with 2% battery remaining in a "not charging" state. So, I leave it charging overnight and it's now at 90%, still stating it's "not charging" in Settings > Battery.
What does the problem point to it being?
Click to expand...
Click to collapse
I have to laugh, I thought the TF201 that I picked up yesterday wasn't charging as it says "not charging" under the battery section in settings.
But I was on 49% charge an hour ago and it's now on 67% charged battery....:silly:
The dock appears to be well and truly dead but will interact with the tablet if plugged in. Seems that you can get replacement batteries, on Aliexpress, for around £17/18 shipped to the UK.
There's a Youtube video that suggests that you need to disconnect the battery if the table won't charge up at all. I had that problem with a Lenovo Tablet that was completely dead. Removed the back and disconnected the battery for 30 seconds or so, then plugged in the charger and it was charging normally once more.
From further reading there's an awful lot of problems with the Transformer series, so I guess I just have to consider myself lucky that it's even charging in the first place???
Related
(Be nice!)
My Streak is only 3 days old and I am thrilled with it but .....
Last night I shut it off and put it on the wall charger as usual at bedtime. It had about 80% charge left and had been working fine all day.
When I got up this morning and tried to turn the phone on, it said "0% Charge" and shut itself off. I had it on my cigarette lighter/usb charger in the car on the way to work (1 hour) and it still said 0% charge. I have had it on charge from the usb on my desktop computer in the office for 1-1/2 hours now and it says 20% charge.
When the phone is shut off, what the heck could discharge the battery completely in 6 hours????? Could the charger be bad and drawing current from the battery? (Shouldn't happen - poor design if it did!)
If it is REALLY sensitive to input voltage, maybe the USB charger in my car isn't high enough to charge the Dell? (I have seen some usb devices that actually want 5.1 to 5.2 volts to charge.)
Anyway, it is slowly coming up but I need to figure out what killed it over night. Has anybody else had this happen????
Dianne
(40 years an electronic tech and just joined The Cell Phone Age LOL!)
Did you fully shut-down your streak, or just turn-off the screen? There is circuitry that stops the battery from charging once a full charge is reached, as over charging will ruin the battery. So the phone should be on while charging. Another thought... Will it even charge if it's not on?
P.S. the thread title does leave some room for jokes
Yes, the phone will charge while it is powered off.
Your car charger may not have the power needed. I have seen a few posts about the car chargers.
Something does not seem right. While on the wall charger it should have been at 100 percent.
Also, my phone will charge fully in 2 hours on the wall charger, not sure of the time on USB.
Sent from my Dell Streak using XDA App
[email protected] dc can charge a hungry streak to full power in 2 hour.
It'll take about 3 H if you are using [email protected]
Sent from my Dell Streak using XDA App
Getting stranger!
After two incidents where the phone SHOULD have charged over night but was dead or nearly dead in the morning, I plan to switch to a USB charger that I KNOW is good but .....
When I tried to power up the Streak this morning (after being shut off last night and left on the charger over night) it was TOTALLY dead - didn't even light up again when I plugged it back into the charger! - so I stuffed it in my pocket until I got to work.
I popped the battery out and measured it - no-load voltage showed 4.0 Volts. When I put the battery back in, the Streak booted fine and showed 100% charge! (It was not battery contacts - I cleaned them a few days ago after the no-charge incident).
It appears that there may be something in battery-backed memory that got out of whack and removing/replacing the battery cleared the error state allowing the Streak to boot. This could tie in with the apparent charging problem?
Any ideas?
are you charging the tab on the dock at night, or separately? does it help/hurt it to charge on the dock every night? Thanks
Doesn't the dock expands on to the tablet's battery since it has it's own. I would think when combined you should be able to charge it all at once.
Same as the original transformer. Keep it docked, and plug the keyboard into the charger...it charges both.
I've just been putting my tablet on the dock at night, and then charging them both through the dock. Both are fully charged and ready to go in the morning. I switch a lot between docked and un-docked mode, but even with heavy use during the day, I don't need to re-charge till evening.
when does the dock begin charging the tablet? right now I am on battery battery power, my dock is at 99% but the tablet is at 79, does not appear to be charging.
aawshads said:
when does the dock begin charging the tablet? right now I am on battery battery power, my dock is at 99% but the tablet is at 79, does not appear to be charging.
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From the FAQ
Why isn’t my Eee Pad fully charged by the mobile docking?
When your Eee Pad is docked and disconnected to a power adapter, the mobile docking only charges your Eee Pad battery up to 90% maximum to protect your battery and prolong its life. The mobile docking recharges once your Eee Pad battery power goes below 70%. The power adapter fully charges your Eee Pad battery to 100% and recharges when below 95%.
then charging it on the dock at night will never get it to 100? where did you find that FAQ?
aawshads said:
then charging it on the dock at night will never get it to 100? where did you find that FAQ?
Click to expand...
Click to collapse
that is only when it's not connected to a power source. when plugged in, both devices will charge to 100%.
curreyr said:
From the FAQ
The power adapter fully charges your Eee Pad battery to 100% and recharges when below 95%.
Click to expand...
Click to collapse
aawshads said:
then charging it on the dock at night will never get it to 100? where did you find that FAQ?
Click to expand...
Click to collapse
from support site
http://dlcdnet.asus.com/pub/ASUS/EeePAD/TF201/TF201_FAQ_en_20111226.pdf
it used to be available from ftp://ftp.asus.com.tw/pub/ASUS/EeePAD/TF201/ but that isn't working today ...
I don't know everything about the battery in the tablet, but I know a bit about batteries in general. When it is plugged in, there will be an almost constant charge on the batteries, meaning heat and stress. That is not good for batteries in general and will decrease the lifespan. Now you could very well be done with the tablet soon before the battery gives out, but why take that risk.
As someone who's worked with batteries, albeit, larger that the ones in question, it is a general rule of thumb to keep the batteries between 80% and 20%. That should be good enough for home. If your travelling, yea a full charge is great and won't hurt, but it would be worse than its worth to run the battery all the way down.
Just my recommendations. Not an expert, but I been around the block.
here is a reference site for battery maintenance
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
it is interesting for Li-Ion it says to charge whilst powered off - my phone is always in the cradle - reading this tells me that is about the worst i could do.
Snippet: from above site
"A portable device should be turned off while charging. This allows the battery to reach the threshold voltage unhindered and reflects the correct saturation current responsible to terminate the charge. A parasitic load confuses the charger.
Lithium-ion does not need to be fully charged; a partial charge is better."
This is also why I never buy a cheap charger for my devices - as you never know if the charger circuit is any good and if it switches off at the moment of full charge.
This becomes more important with devices where the battery is not "consumer accessible"
Hi, is it possible to make the phone charge whilst the screen is on?
plugged in charger at 37% battery and drove with navigation for 6 hours and when i arrived it was still 37%, would of been nice to charge it at the same time.
On return journey i kept screen off for the last hour so it would charge.
Thank you
It does charge even when the screen is on. I charge it while web browsing and it goes upto 100. You're using a navigation app which is processor extensive(as well as data) so that's why you battery neither dropped nor increased.
Sent from my GT-I9300 using XDA
if it wasn't charging your phone would have been flat after an hour, instead you got six hours of satnav and some more for later.
You might find that you can get a bit more if you use a different car charger with a higher ampage, but breaking even is to be expected with SatNav.
Thanks, thats a shame as my SIi charged with navigation on.
I understand its powering the phone but not charging the battery, i use a 2amp charger same as i used for the SIi
USB car chargers are never as good as the wall chargers for charging your phone when the screen is on. I have tried 1 amp and 2 amp car chargers of different brands and like you, if my percentage is say 38% or whatever with screen on, then it will take close to an hour just to put 1% charge. Plug it into wall charger with screen on and it charges much quicker.
Hi XDA,
I've got hold of an old TF101 tablet - it hasn't been switched on in at least 7 months due to the charger going missing.
I bought a new USB cable and have managed to get the device booting. It took several hours to get a single bit of charge in it, but I found a thread regarding the batter charging times, depending on the type of charger being used.
The official ASUS charger outputs 15 VDC which will charge the tab at 35% per hour, with the screen on, and will give a visible charging icon.
All other charger plugs will NOT charge the device with the screen on, and will NOT show a charging icon. However, I've found that the iPad charger outputs the most VDc and will charge the tab whilst it's off at 10% an hour.
For two nights in a row now i;ve left it on charge and have come down to it only sitting at 37%.
Does anyone have any suggestions on a fix? I have tried hard resetting etc. I guess I should buy a whole new charging unit and see if that works?
Cheers!
Anyone using this battery charging case? Bought one from Amazon a week ago, it works great but there is one problem.
As we know when just charge the phone using any USB C cable. I usually charge it at night when I goto bed, so when it charges the phone up to 100% full and the phone will remain 100% unless I unplug the charger (doesn't matter how many hours or days)
But if I put the Alpatronix battery case on my phone, when I charge it all together (according to the manual , it was programmed to charge my galaxy s8 first then battery case) When my phone reaches 100% it stopped charging and I can see the battery starts draining even though my charge cable still connected. This is what I don't understand. I tested it with straight charging cable and wireless charging. Both end up the same with the Battery case attached. It will charge my phone and the battery case for sure, but it stops charging while my phone reaches 100%. And when it starts draining from 100 to 99 and so on. It will not automatically charge my phone itself till it is full. It will only charge the phone when I am not using battery case. My phone will remain 100% all the time with charge cable connected. No matter how long I have the phone connected to the charger, hrs, days. It will keep it 100%. I wonder what is the main problem? Would it be a defective Alpatronix battery case?
I think it is normal?
I've had many kind of power bank, which is the same principle as battery case. Most of them stopped charging when phone battery is full, and yes, you need to initiate the charging again if the phone battery starts decreasing (usually by pressing the button).
Well, there are several "smart" power banks that starts charging when you plug in the phone, and does trickle charging when the phone is full. But, what I want to say is that not every power bank is made of the same system.
StardustGeass said:
I think it is normal?
I've had many kind of power bank, which is the same principle as battery case. Most of them stopped charging when phone battery is full, and yes, you need to initiate the charging again if the phone battery starts decreasing (usually by pressing the button).
Well, there are several "smart" power banks that starts charging when you plug in the phone, and does trickle charging when the phone is full. But, what I want to say is that not every power bank is made of the same system.
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Click to collapse
Are you talking about power bank or battery case?
If you know any battery case that has the feature I mentioned above, can you give me the name?
I have a few power banks but I don't like carry it separately. Battery case is more convenient.