Tab A8 10.5 can't run without being plugged

[Members_3p1InE4]

So basically 10 months ago I got galaxy tab a8, I was not using it for 2 weeks, and it was discharged of course. Charged it couple days ago and everything was fine until yesterday.

Tablet was off, I couldn't turn it on without tablet being on charger. Then, when it was on charger and I tried to turn it on - it was in two ways. .

1. turned on, Samsung Galaxy loading screen, then back to battery with white round border screen again.
2. tried safe(?) mode - can do, but works 10 secs or 3 mins and then turns off to battery screen again.

I was charging it by powerbank always - that was easier to me. Now it doesn't work, only 'charging' from one charger. 'Charging' I mean - for 3h on cable, in one hour it did mby 40%? then I tried to turn it on and it went 6%. 

I charged it whole night today, at 8'o'clock was 100, but when I tried to turn it in safe mode - it turned off and again somehow showed 12%. 

• Note that I'm also really lazy person to do any updates, so since I bought it I did maybe one? update. 

Also I tried hard reset, clear cache partition and nothing seems to work.

 What can I do in that situation? Thanks.

[AndrewL]

@Members_3p1InE4: Are you using a genuine Samsung plug adapter, and the USB cable that cam packaged with your device? If so, have you tried connecting to another power outlet, or using another compatible charger to see if this helps? If you have access to a home computer, please can you also try connecting the tablet to it via USB cable, to see if a stable charge can be established? 

If the problem persists following the steps above, then I recommend getting in touch with the Support Team in your region by visiting samsung.com > Scroll to the bottom of the page > Contact us (or check the Support section), and an advisor will be able to assist you further, and arrange any necessary repairs. 

[Members_3p1InE4]

@AndrewL @Yeah, I use original samsung powerbank or charger with  original cable attached to it. I tried to connect to my phone charger for S23+ which is super fast charger - also not working. Will check after work for connecting to PC solution, thanks