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[Q] USB plugged in all day

Is it alright to have the SGT plugged into a USB port all day (approx 9hrs) ? I'd like to have it keep its charge (maybe even gain a little) while I'm at work so I can have a decent amount of juice for the trip home and until i go to bed. Or is this a good way of burning out my battery real quick? Thoughts?
Oh and as a side note on USB charging, I was able to get from 15% to 99% in 7hrs with the screen off the whole time.

Is it a slow-charging USB port? Or is it a powered hub? If I'm not mistaken, slow-charging a lithium-ion based battery pack is actually better for its life as opposed to rapid charging.

Its the regular port on the PC not even high speed usb so i guess it isn't powered.hmm guess the charging part is OK..but what about leaving it plugged all day even if the battery is at 100%?
Sent from my GT-P1000 using XDA App

All usb ports are powered by definition. They can supply up to 500ma (half an amp). Dont worry about leaving your tab plugged in, devices are smart enough these days not to overcharge the battery.
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TheCoda said:
All usb ports are powered by definition. They can supply up to 500ma (half an amp). Dont worry about leaving your tab plugged in, devices are smart enough these days not to overcharge the battery.
Sent from my GT-P1000 using XDA App
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Coda is right, technically they all have power . If not, how would any device charge? I guess I really meant to say USB ports charge at a higher MA or something for rapid charging (wall-socket USB adapters?).
Also, Coda is right again. Devices these days are fairly smart. I typically leave my HD2 plugged in all the time with no problems.

itll be just fine plugged in!
ive been part-charging mine at random intervals (sometimes for 20 mins at a time a few times a day) and leaving it charging over a day from both powered hub and charger over about five months... though i have had two or three near total discharges
the battery has got better, which is what you would expect from the tech - sammy even provides a nice notification telling you the device is fully chraged
i wonder if they put that in there to account for unexpected battery problems down the line? in any case, ive read that low-powered charging, even unregistered by the battery, will increase the lifetime of the battery and also charge at approximately the same rate... ive seen this with my phones charging over pc usb

Great! Nothing to worry about then. The tab would look really cool on my office desk sporting the same screensaver as my PC ..'the Matrix' scrolling code.

I think it is OK. I bought a 2d adapter, one for the office. Since Sammy is selling docks, it also means that it can be powered all times. On the other hand I remember my Archos which I used to leave it on its dock all times... battery was killed in a short time. When you sell multimedia charging docks it means that you can leave it there, no? Not in the case of Archos.

charging

do you guys leave your tf plugged in at all times?
Sent from my Transformer TF101 using XDA Premium App

Nope, I unplug it when its fully charged and only charge when there is less than 10% left.

I ordered a USB 3.0 extension cable. One of the reviewers for it said it worked perfectly for his TF. One of the most annoying things I found was not being able to charge from the computer while I used the device. The plug was way too short for the wall. This one is awesome and very cheap. Here is a link:
6ft USB 3.0 A Male to A Female Extension 28/24AWG Cable (Gold Plated)
Quotes from the reviews of it:
"Powers and charges the ASUS Transformer tablet when used with the ASUS Transformer power adapter. Also works as data cable when connected to PC."
"i bought 5 of these for random usb charging extension for mainly tablets - ipad, transformer, galaxy tab. these work perfectly fine and charge at full speed."

It's better for Lithium-Ion batteries to drain little and top-up as often as you can so I plug it in whenever I'm not using it.

frosty5689 said:
It's better for Lithium-Ion batteries to drain little and top-up as often as you can so I plug it in whenever I'm not using it.
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I hear a lot of back and forth about this. Do you have a source for this info? (Not doubting you, just, like I said, I constantly hear people changing their minds on this)
EDIT: Nevermind, maybe I am thinking way back or something. I am finding most info points to "Don't deep drain if you don't have to"... just google lithium ion battery care if you thought the same as me.

I'm curious, i just got my transformer today, in the instructions it says to charge it for 8 hours. But I had full charge after 3 hours. Do I still need to charge it for another 5 hours?
--Jak

wakjagner said:
I'm curious, i just got my transformer today, in the instructions it says to charge it for 8 hours. But I had full charge after 3 hours. Do I still need to charge it for another 5 hours?
--Jak
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yes you should, the battery needs overcharged for premiere usage. but after that don't overcharging your battery in daily usage which the OP is asking.

I charge mine a few hours at night, but unplug it overnight. Since I have the dock, I don't even come close to running out of battery during the day so I leave it uncharged until night time again.
In this case, my Tablet is always 100% and my dock battery drains and gets recharged. I have no idea what my battery life will be later on hehe.

Lithium ion are good for about 300 to 400 charge cycles...usually closer to 300. It is a good idea to charge fully and then simply let it run down. ...i am a tech at a lathe national company. We see trouble tickets from users about batteries on laptops frequently. If the device sits plugged in all the time your battery will last a little over a year before it's about 50% effective. I have no source for my data, just experience.
Hope that helps
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*sigh* lathe = local
Sent from my ADR6300 using XDA App

6 hours to recharge?

I recharged my Galaxy Tab 10.1 yesterday from a 15% remaining charge.
I powered it off and used the wall charger. It took almost 6 hours to charge to 100%!
Is this normal or is there something wrong with the battery?
Thanks!

Mine was slow at first too. But now seems to have gotten quicker.

luigig said:
I recharged my Galaxy Tab 10.1 yesterday from a 15% remaining charge.
I powered it off and used the wall charger. It took almost 6 hours to charge to 100%!
Is this normal or is there something wrong with the battery?
Thanks!
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What is the rating on the charger that comes with the unit?

The rating is 5V - 2A

Yep, noticed it took about 3 hrs to go 40% charging. Not sure why there is such a drastic difference from the Xoom which could charge from 10% to full in little over an hour with similar drain to GT.
Sent from my PC36100 using XDA Premium App

Ravynmagi said:
Mine was slow at first too. But now seems to have gotten quicker.
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Can you please quantify what quicker means?

We have a rather large battery in the device, while I agree 6 hours is abit much, it should be quicker at 2 amps.
On the other hand, I sit in on the charger at night before I go to bed. I am definately a heavy user as well, and the battery lasts me all day with atleast 30 to 40% left over by bed time (this includes a 1.5 hour commute each direction using Waze, the GPS, and wifi tethered to my phone, 2 gmail accounts polling every 15 min, web surfing throughout the day, and playing games during my morning and afternoon constitutions .. I know.. too much info)..
So I can live with a longer charge time, at least for now..

I charged my GT Tab completely before using it the first time. Then I drained it down to about 9%. I timed my first full charge from 9% to 100%, it took exactly 6 hours and 4 min. My Xoom charged in half the time. I am hoping it gets better like I have heard from different people.

dsEVOlve said:
Yep, noticed it took about 3 hrs to go 40% charging. Not sure why there is such a drastic difference from the Xoom which could charge from 10% to full in little over an hour with similar drain to GT.
Sent from my PC36100 using XDA Premium App
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i believe the xoom's charger is 16watts or more. i can't really remember, but it's got the highest rated charger b/t the xoom, tf, and gt10.1.

I think that's just wishful thinking on their part. How does a battery suddenly learn to charge itself faster. You make it sound like the battery is a muscle you can work out. The thing takes forever to charge but it also has excellent battery life. So as long as you don't find yourself in a hurry to travel without time to charge the battery should last you almost all day.
Sent from my PC36100 using XDA Premium App

I charged the device fully before use. Used it down to 10%, plugged it in and charged to full powered off. This took around 6 hours. The second time I charged it from around 14-15% It took about 4 hours. I have charged it twice more since from almost zero, and it's taking about two hours.

Remember the math:
7000 mAh battery
2000 mAh charger
That means from drain to full if the screen is off, about 3-4 hours. If you have the screen or device on and it's doing anything, it's using some of that incoming charge, so will increase to 4, 5, 6 or more hours to fully charge.
Gets even worse if using an aftermarket charger, say a 800 mah or 1000 mah charger like the iPhone or Kindle charger...can then take 10-14 hours to fully charge, hehe.
It's funny how people say it charges quicker after a while, when that's not logical, you just don't notice it as much going from 65% to 100% as you noticed when it went from 15% to 100% the first time, hehe

tycon said:
I charged the device fully before use. Used it down to 10%, plugged it in and charged to full powered off. This took around 6 hours. The second time I charged it from around 14-15% It took about 4 hours. I have charged it twice more since from almost zero, and it's taking about two hours.
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The xoom charges super fast, like from almost zero to full in around 2 hours. That's about all i miss right now
Sent from my PC36100 using XDA Premium App

jvs60 said:
The xoom charges super fast, like from almost zero to full in around 2 hours. That's about all i miss right now
Sent from my PC36100 using XDA Premium App
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Smaller battery=shorter charge, a 2 gallon gas tank is quick to charge too, hehe.... kidding.
But seriously, Samsung is bad with their charging. My Samsung Infuse and my Galaxy tab both take forever to charge.

tycon said:
I charged the device fully before use. Used it down to 10%, plugged it in and charged to full powered off. This took around 6 hours. The second time I charged it from around 14-15% It took about 4 hours. I have charged it twice more since from almost zero, and it's taking about two hours.
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Did I read it correctly that if recharged from almost 0 (e.g. <5%?), it takes only 2 hours to go to 100%? This seems counter intuitive.

luigig said:
Did I read it correctly that if recharged from almost 0 (e.g. <5%?), it takes only 2 hours to go to 100%? This seems counter intuitive.
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I think someone has a bad battery

verusevo said:
I think that's just wishful thinking on their part. How does a battery suddenly learn to charge itself faster. You make it sound like the battery is a muscle you can work out. The thing takes forever to charge but it also has excellent battery life. So as long as you don't find yourself in a hurry to travel without time to charge the battery should last you almost all day.
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i think what happens is that as the battery calibration gets more accurate it finds where to quick charge and where to trickle in the appropriate levels.

Best way to charge this faster?

This thing seems like it charges slower than my old iconia tab, the nexus takes about 2-4 hours to charge fully depending on when you started charging it, anyone know how I could charge this fully from dead state to full charge in under an hour and a half?

turn the tablet completely off while charging, personaly i doubt you can force it to charge faster with a different adapter, however you can minimize the power consumption while charging it = turn it off!

azoller1 said:
This thing seems like it charges slower than my old iconia tab, the nexus takes about 2-4 hours to charge fully depending on when you started charging it, anyone know how I could charge this fully from dead state to full charge in under an hour and a half?
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I had an Iconia A100, it has a propriety power connector that basically supercharged the tablet in about an hour. Unfortunately it wasn't able to charge through USB and the battery life was about 1/3 of what it is on the nexus 7.
All that said, I think it is pretty reasonable to have a few hour charge time to get the N7 fully charged up for the 9.5 hours battery life.if your short on time, just disconnect it during the charge.
Sent from my Nexus 7 using Tapatalk 2

Samsung S5e screen on time and charging

I purchased this tablet brand new maybe 6 months ago and haven't used it that much at all.
Tablet is maybe charged like 10 times total.
I noticed that Screen on time is drastically used from 9 hours when I purchased it (9 hours on wifi) to now only 6 hours (cca like 70 % of use with wifi).
So I thought that the stock charger is reducing the battery capacity because it is quick charger and charging battery with high current which I don't need.
Is it possible quick charger is the issue and making battery in worse condition?
Now I put it to charge over USB 2.0 port which is I think giving only 500 mA.
I never got 10 h of screen on time like on declaration of the tablet.
What is your SOT for this model?

Delete

paparazzo79 said:
I purchased this tablet brand new maybe 6 months ago and haven't used it that much at all.
Tablet is maybe charged like 10 times total.
I noticed that Screen on time is drastically used from 9 hours when I purchased it (9 hours on wifi) to now only 6 hours (cca like 70 % of use with wifi).
So I thought that the stock charger is reducing the battery capacity because it is quick charger and charging battery with high current which I don't need.
Is it possible quick charger is the issue and making battery in worse condition?
Now I put it to charge over USB 2.0 port which is I think giving only 500 mA.
I never got 10 h of screen on time like on declaration of the tablet.
What is your SOT for this model?
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My record is 11 hours using Netflix and Amazon video with 100% Wi-Fi in 48 hours of use. If it's 6 days, about 9 and a half hours. Downloading series and watching the chapters offline, it gives me 12 and a half hours with manual brightness of 70% on average. I am on android 9 and I have no intention of going up to A10 or A11 if it ever arrives. Very happy with my Tab S 5e!

Li's don't like sitting at a full charge especially in high heat. A 50% charge is much better for long idle times. Limiting the top charge to 80% and the max discharge to 20%, preferable 40% will greatly increase the life of the cell.
The capacity lose is most likely permanent.
If any swelling is noticeable replace immediately... fire hazard.

Then something is wrong with my tablet.
My total SOT is around 6 h watching youtube videos.
Is it better to do slow(normal) charge for the health of battery?