Tablet (display) consumes more power than charging supplies?

pstein · Aug 16, 2016

I bought recently a new Samsung Galaxy Tab A 10.1 LTE tablet.

At a akku/battery level of 62% I plugged in the power cable and continued to work on Android 6.0
Nothing extraordinary (no video) just some tapping and writing.

Much to my surprise after approx 10 to 15 minutes the battery level was at 60%. That means 2% LOWER than at the time when I start charging the battery!

Than means the display and cpu work consumes more power that the charging power cable supplies.

Can that be?

I used the original cable.

Are there any options to speed up charging the power?

Peter

Thom · Aug 16, 2016

Was it plugged into a wall charger or a computer? Charging from a computer is MUCH slower than the wall charger.

... Thom

pstein · Aug 16, 2016

Thom said:
Was it plugged into a wall charger or a computer? Charging from a computer is MUCH slower than the wall charger.
... Thom

No. wall charger

Thom · Aug 16, 2016

Do a Wipe Cache Partition deleting all temporary data and see if it improves.

If still bad reload in Safe Mode and see if it improves. If it does it was caused by an app that you added.

If still bad ... I would assume a defective charger or cable.

... Thom

lvt · Aug 16, 2016

Do you use the original cable that comes with the device ?

Anyway for tablets you'll need a wall charger with 2A output and a thick cable, the shorter the better.

Fox Mulder · Aug 16, 2016

You can look under Settings/Battery to see a list of what things are using the most battery power, the highest-consuming ones are at the top of the list. If all is normal you should see Screen and Android System at the top followed by a bunch of apps depending on what you've been using. If a particular app is being a battery hog you should be able to see it here.
There are apps that will tell you what the actual charge/discharge current is, try using one of those (make sure you get one that doesn't have a billion unnecessary permissions).
Or for even more info you can get GSam Battery Monitor which will show you not only the battery current but details of what's using the battery beyond what you can see in the Settings menu.
I don't see mention of this tab being Quick-Charge enabled, so assuming it comes with the standard 2A charger I'd expect to see a charging current of at least 1.2A, maybe higher since it has a 7300mah battery.

12345Michael54 · Aug 16, 2016

It would be a very common situation if the phone were plugged into the car and being charged that way.

Back when I was using a 0.5 amp charger plug I bought at the local dollar store (which worked fine with my previous phone), I could plug in my G3 with the battery at 50%, use it for an hour or so of streaming music and/or navigation, then have the battery go dead.

With a 2 amp plug, I can plug in the G3 with the battery at 50%, run those same apps, and after an hour or two the phone's charged to 100%.

So I suppose the problem could be with your wall charger, and not with the phone or the apps you're running.

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Tablet (display) consumes more power than charging supplies?

pstein

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