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Anyone else seem to have dock to tablet charging change in behavior after the V9.4.5.26 firmware update?
Before the current firmware I recall the dock topping off my tablet battery after the Infinity was left idle for a while. Now it seems the dock at best is only slowing the tablet's battery drain. If I reboot the tablet the dock seems to make more progress towards charging the tablet battery closer to full.
I don't quite know if I'm misremembering the old behavior, or this was a firmware change, or I should be concerned about a faulty dock to tablet connection.
sandymacjr said:
Anyone else seem to have dock to tablet charging change in behavior after the V9.4.5.26 firmware update?
Before the current firmware I recall the dock topping off my tablet battery after the Infinity was left idle for a while. Now it seems the dock at best is only slowing the tablet's battery drain. If I reboot the tablet the dock seems to make more progress towards charging the tablet battery closer to full.
I don't quite know if I'm misremembering the old behavior, or this was a firmware change, or I should be concerned about a faulty dock to tablet connection.
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Mine beheaves just like yours, but I'm still on .22
When the tablet's battery is empty and I plug in the Dock it loads the tablet
but when I put the tablet with the dock together when both of them are about 70 % then the dock isn't loading the tablet
---------- Post added at 05:07 PM ---------- Previous post was at 04:17 PM ----------
I just found out that the dock has started to charge the tablet when the tablet's battery was going under about 60%
Same behavior here
no reason dock should have charge if tablet isn't full. charge in dock is pointless.
My unreliable understanding is a 0% empty or 100% full lithium battery will have a shorter usable life span than a lithium battery maintained around 75%. I can understand that trade off for the dock battery if that is what is happening.
gottahavit said:
no reason dock should have charge if tablet isn't full. charge in dock is pointless.
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Last night I noticed that the tablet says "charging" while in the dock, and the dock depletes. It seemed pretty slow and the dock seemed to drain reasonably quickly. From what I've read, its supposed to drain both at a slower rate.
Personally, I like the idea to have the dock charge the tablet. It just makes more sense.
Mine was still not charging the tablet at 76%, now I docked it under 66% and it's charging, so I believe it goes on somewhere around 70. I think it was somewhat sooner under .21 and .22, but after installing SwiftKey (crypto-ad) I'm rarely using the dock when not using the shell (but hey, I'm on holiday!).
Edit: Stopped charging at 90% (the dock is 60% now, so ~25:40 ratio, btw), seems reasonable.
sandymacjr said:
My unreliable understanding is a 0% empty or 100% full lithium battery will have a shorter usable life span than a lithium battery maintained around 75%. I can understand that trade off for the dock battery if that is what is happening.
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Then no charger should ever charge past 75 %. Now if you want to argue not depleting the dock past 10% i would buy it.
sandymacjr said:
My unreliable understanding is a 0% empty or 100% full lithium battery will have a shorter usable life span than a lithium battery maintained around 75%. I can understand that trade off for the dock battery if that is what is happening.
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It does make sense, switching charging off and letting the battery drain partly allows the battery in the tablet to have a longer life span. It usually let's it drop 20% or so and then charges it for a certain amount. If you keep charging from 90% to 100% over and over, it depletes the life span of the tablet's battery.
Sent from my ASUS Transformer Pad TF700T using xda app-developers app
KilerG said:
It does make sense, switching charging off and letting the battery drain partly allows the battery in the tablet to have a longer life span. It usually let's it drop 20% or so and then charges it for a certain amount. If you keep charging from 90% to 100% over and over, it depletes the life span of the tablet's battery.
Sent from my ASUS Transformer Pad TF700T using xda app-developers app
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With Lithium Ion though, that shouldn't be an issue from what I understand. NiCad's, and to a MUCH lesser degre NiMh's will get that memory effect, but Li-ion's are immune to it, in fact they do better when kept charged up.
californiarailroader said:
With Lithium Ion though, that shouldn't be an issue from what I understand. NiCad's, and to a MUCH lesser degre NiMh's will get that memory effect, but Li-ion's are immune to it, in fact they do better when kept charged up.
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That is true, Li-Ions are much better off staying between 40 to 80% and don't have the dreaded memory effect of NiCd and NiMH. However, when you get close to 100% when charging the voltage is also very high, which can shorten the lifetime of the battery in the long run. That's also what KilerG is saying.
It's better for the battery to just let it discharge a bit, then charge it up again. Maintenance charging it at 100% will require a lot of juice from the dock when the tablet is in use. The charge efficiency is greatly lowered when above ~80% since you need to continue increasing the voltage, but decrease the current to avoid overheating and damaging it.
My dock is currently at 78% battery while the tablet is at 77%. It's been on battery power for about 2,5 days now, I've only used it for a short time lately as I've been busy with other things.
Last time I took it off AC and it was more actively used, the dock depleted more quickly while the tablet was being topped off by the dock every now and then. Gives the tablet a lot longer usage, although you could end up with an empty dock while the tablet is still running. That's fine with me, the dock isn't much use without the tablet.
Edit: Actually, the battery indicator wasn't updating it seems. I undocked and docked again and the numbers went from 78% and 77% (dock and tablet) to 63% and 85%. Not sure why the battery status isn't updating properly. Might just be a one-time thing.
From the Asus forum:
http://www.transformerforums.com/fo...attery-related-matters-transformer-range.html
Excerpt:
TF201/TF300/TF700
* The charger charges the docked combo all together.
* When fully charged, the tablet uses the charge first, then the dock charges the tablet. The idea being that the dock battery will be depleted while maintaining the tablet battery. See below...
The way the combo works is that the dock does not charge the tablet continuously. I believe the percentages are along the following lines..
Dock 100%
Tablet 100%
Tablet uses charge until the level is around 70%. At this point the dock will recharge the tablet back up to around 90%, if the tablet is not being used.
If the tablet is being used, then the dock "powers" the tablet, balancing the charge rate with a direct bias to ensure that the dock will eventually drop to 3-5% with the tablet at around 90%.
The dock shouldn't allow itself to become any more discharged than 3-5% & neither should the tablet. Android will warn you when the tablet drops to 14%.
The dock will still continue to function until the tablet shuts off.
----------------------------
However, this is not my experience, which is why I was researching it in the first place. Dock charging behavior is inconsistent. I started seeing that the dock was no longer fully charging the pad w/o a cold boot recently (I'm still on ICS, rooted). Then it would develop the problem again after a short time, even when plugged into AC. Right now I'm plugged into AC. At start my dock had no charge and the tablet had about 60%. The AC charged the dock and the dock passed charge to the tablet until the tablet had 100% charge - correct behavior, I believe, since this is what it did when brand new (it's still quite new). Many have posted about the dock not charging the pad over time. I think there's a hardware issue of some kind, or system software problem since it temporarily will correct after a cold reboot. Or maybe there's a software conflict. I've been uninstalling stuff to free memory.
Einride said:
Edit: Actually, the battery indicator wasn't updating it seems. I undocked and docked again and the numbers went from 78% and 77% (dock and tablet) to 63% and 85%. Not sure why the battery status isn't updating properly. Might just be a one-time thing.
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I'm having this problem, too. After charging both batteries to 100%, I unplugged from AC, and I've been using the pad for a couple of hours. The battery indicators still say 100%. I think this may be a hardware problem (or an API problem) because Dual Battery Widget reports the same. Undocking and redocking did not help. I suspect only a cold reboot will help. Perhaps my prior problem was a battery indicator problem, and not a charging problem, as it seemed.
Hi Guys,
I remember reading a post about this before but can't bloody well find it
With my tablet docked, they keyboard battery is draining much faster than my tablet resulting in a useless dock fairly quickly i.e. 0% in dock vs 80% in tablet. This seems quite a gap - I'm running stock, not rooted. Is there anything I can do to improve this? I don't remember the charge gap being so vast in my first TF700.
Any advice/suggestions are most welcome.
Thanks.
Sent from my ASUS Transformer Pad TF700T using xda app-developers app
Been discussed before. Dock still operates at 0%, no need to keep a charge in there. It acts as the sacrificial battery, making the tablet use that power first, so if you so choose, you can continue using the tablet w/o dock or with dock and get the maximum battery life both ways.
Thanks Nick, I thought I noticed my keyboard wasn't working before when at 0% but will give it another whirl tonight. If it does work then bravo on Asus
i recently bought the dock and i also find the battery drain rather strange. i always turn off wifi over night and the battery of the tablet usually stays exactly the same, e.g. if i fully load the tablet before going to bed, i have like 99% in the morning without any drain.
yesterday i went to bed with dock 80% and tablet 85% and wifi off. today i find the dock left with only 40% and the tablet with 82%? is this normal? i guess i have to take them apart all the time over night otherwise it just drains too much
Definitely is not normal - I leave mine docked overnight with wifi *on* and I only get a percentage or two drain...
To start with, 'd look (with CPU Spy) to make sure you tablet is deep-sleeping properly.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2
That's odd. Maybe some process kept running overnight.
Check that the following are set:
- GPS to OFF
- IPS+ OFF (set it to IPS mode. + drains 10% or some overnight, even when off.)
- Mode to Power Saving!
- Shut down all active processes (taskmanager has this convenient one click clean.)
- Check that media players have shut down properly in the Settings/Apps/Running apps menu. Also make sure they're not still cached (VLC tends to do that...)
I think that this is normal behavior. I notice that after using the device for a while, when I shut it off the dock battery actually charges the tablet battery. The charge light on the tablet even indicates that this is the case. I believe that is by design.
Dub Tech said:
Hi Guys,
I remember reading a post about this before but can't bloody well find it
With my tablet docked, they keyboard battery is draining much faster than my tablet resulting in a useless dock fairly quickly i.e. 0% in dock vs 80% in tablet. This seems quite a gap - I'm running stock, not rooted. Is there anything I can do to improve this? I don't remember the charge gap being so vast in my first TF700.
Any advice/suggestions are most welcome.
Thanks.
Sent from my ASUS Transformer Pad TF700T using xda app-developers app
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The charge light is indicating the tablet is (primarily) running off the dock battery. EDIT: although this is in essence a correct statement, I have paid more attention to it and noticed the dock does indeed charge the tablet (when not in use) -- it's a few percents, but nonetheless, it charges. Mea culpa..
The capacity of the tablet and dock batteries is different, so discharging under load will differ as well. I guess the behavior you are seeing is by design, and, to some extent preferable to the situation I have had since the beginning: my tablet depletes faster than the dock, at least initially, and that was what most of the early adopters were seeing, as well. This of course led to some discussion.
The behavior we noticed seemed somewhat counterintuitive, since it meant we would have less battery capacity on the tablet if we would choose to undock it -- as opposed to your situation, where you have as much battery capacity left on the tablet as possible when you choose to 'travel light'. I'd prefer it that way. ; )
So, the dock depleting significantly faster is nothing unusual nor anything to worry about. I do have to concede, though, that my battery drain is far less than some in here report -- it has been going for three and a half days with moderate use now. (That's OK, I guess, given the fact that I currently am in nightshifts and do not have to time to tinker as much. Even when I *am* tinkering, though, the batteries routinely carry me over two days, easily.)
My dock and tablet have weird battery usage.
So my problem is really weird I think, but maybe you guys can confirm or offer any fixes. I have tried charging the tablet and dock assembled through the dock port and gotten both batteries to 100%, but then while docked, the tablet's battery drains faster and the dock;s remains at 100%. As the tablet's battery gets to around 70%, the dock's will start to deplete but very slowly. The dock will only go to 70%, and the tablet will drain completely to 1% and then shut off even though the dock still has 70%. I then undocked the tablet and just charged the tablet back to 100% without doing any charging to the dock. After docking the tablet, it shows the tablet at 100% and then the dock at 70%. This time the tablet drains to 1% and then shuts off with the dock still at 50%. What's going on here or is it normal or is there a setting that I'm missing? I thought the dock was supposed to extend the tablet's battery life time??
Hi, quick question about usage of battery cases. Is it better to let the battery case keep the phone charged (at 100%) as if using the phone while plugged into. Or to let the phone battery drain then use the battery to charge it?
Thanks
Depends. The more you use your phone's battery (charge cycles), the more it ages. At the same time, keeping a Li-based battery at 100% charge is also not healthy, and can reduce life expectancy of the battery.
Personally, I would only use the external if I needed it.
-- Sent from my TouchPad using Communities
I have bought two of these the first one swelled up until the cover wouldn't fit... now the second one the charge just goes away in idle... i am wondering if other people complaining about not being able to keep a charge is a battery issue and not a rom... i am constantly going back to my factory battery...it seems to hold a charge longer and keep its ability to hold a charge over years of use better than these after market bigger batteries... does anyone know of a good replacement that stays good over time?
Sent from my SCH-I510 using xda premium
How long have you had them? Totally sucks to hear that - I just bought mine a few weeks ago and love it thus far. I haven't had a problem with the original battery but I work 12 hour shifts in a cellular black hole. Even with data/wifi/GPS turned off, I normally leave dangling from a thread... I know that any lithium ion battery requires proper "care and maintenance" - have you been good about letting it discharge appropriately and not keeping it plugged in all the time?
My original battery lasted 10 months. It stopped holding a charge so I purchased the OEM 2600 battery and cover. Works like a champ - I get a full days use - and I only recharge it overnight. I am running stock/rooted/debloated, but I expect Tweaked to provide even better battery life. In my experience a swelling battery is due to excessive heat.
Sent from my ASUS Transformer Pad TF300T
Reilly1812 said:
My original battery lasted 10 months. It stopped holding a charge so I purchased the OEM 2600 battery and cover. Works like a champ - I get a full days use - and I only recharge it overnight. I am running stock/rooted/debloated, but I expect Tweaked to provide even better battery life. In my experience a swelling battery is due to excessive heat.
Sent from my ASUS Transformer Pad TF300T
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Or charging too fast, or a defective battery
thanks... i try good battery practice... lol... but wen I am on low and near a socket... i get what I can...i will try finding the larger oem battery... mine was a cheap one...and as for charging I have to use a tablet charger because it's the only one that works on a 74volt socket in a locomotive...
Sent from my SCH-I510 using xda premium
Hi.
My tablet had some charging issues, but after I bought another cable it worked until now.
It says "97% Full" and it does not charge more than 97%!
What is the problem?..
Thanks.
Sent from my Transformer TF101 using xda app-developers app
Nevermind. Here is what I have done to make it work:
1. I unplugged the charger and checked it
2. I flashed through TWRP and pressed Settings -> Fix Permissions, then flashed the Insecure Stock Kernel as I am rooted
3. I cold booted the device
4. I uninstalled the suspect apps which I think that they didn't let the tablet charge correctly
5. I downloaded some battery drain apps and drained the tablet to 0% while watching a movie and playing
6. I plugged in the charger again and let it charge for 4 hours (ignore the red battery icon)
7. I turned it on and it was 100% charged.
8. I uninstalled the apps that drains my battery
9. I hope it charges now, lol.
Sent from my Transformer TF101 using xda app-developers app
This is a known issue for lots of devices. I have this issue with my TF101 and my MacBook Pro.
From http://guides.macrumors.com/Laptop_Battery_Guidep/:
What is "full cycle"?
A cycle is when the total battery power is less then 50% before it is recharged. The battery electronics monitor the status of the cells during use, and not cycling the battery at least once a week may cause the electronics to get false recordings. It is best to fully drain the battery before you charge it up again. Seeing a fully charged in your battery status monitor as 99% is a good indication to fully cycle your battery.
Thus it's always good to completely drain your battery and charge it fully at least once a month, preferably more. Apple offer a calendar reminder to do it monthly on their website.
It won't charge if it is already charged 95% or more
Drain below 95% then it will charge to 100%