topic Re: Tab S9 Ultra Battery? in Tablets

Tab S9 Ultra Battery?

Adrr556 — Mon, 14 Aug 2023 15:11:42 GMT

Might have an issue with my new Tab S9 Ultra and am wondering if this behaviour is normal.

I got the tablet last week, charged it to full using the official 45W Samsung Charger and 5A cable (this charges my S23 Ultra at Super Fast Charger 2.0 speed) before setting up. I've only charged it three time so far but I've noticed that when charging it, it reaches 100% incredibly quickly, when I went to reboot it though, the battery percentage drops massively.

Just charged it from 5%, got to 100% in 45 minutes which is impossibly quick so I rebooted it and it was at 54%. Is this normal? It did this before where I charged it again to the 'true' 100% after rebooting and the battery got me 3 days+ of use with 8hours SOT in that so the battery life is definitely OK, just wondering about the reporting of the battery charge level of that makes sense?

Re: Tab S9 Ultra Battery?

Adrr556 — Mon, 14 Aug 2023 15:15:57 GMT

This is what it looks like, there's the massive drop upon reboot

Re: Tab S9 Ultra Battery?

keith30 — Mon, 14 Aug 2023 16:17:02 GMT

Why the need to keep rebooting it, if like you say it charges up to the full 100% mark?

Re: Re: Tab S9 Ultra Battery?

Adrr556 — Mon, 14 Aug 2023 16:19:22 GMT

It's more that it's not normal behaviour. It shouldn't go 5% to reporting 100% in 45 minutes. The reboot was to see what the battery is actually at if that makes sense?

Re: Tab S9 Ultra Battery?

Anonymous User — Mon, 14 Aug 2023 18:22:02 GMT

How many times has this happened? If its just the once then it could be a one of bug if this happens again then it's possible you could have a faulty battery in which case contact samsung for a replacement or just return and reorder

Re: Tab S9 Ultra Battery?

raghuvirab — Tue, 15 Aug 2023 07:13:31 GMT

I am seeing the same issue with my tab s9 ultra. it charged to 90% in 45 mins on a 25W charger. Restarted and now it shows 52% charged.

Re: Tab S9 Ultra Battery?

Trashi — Tue, 15 Aug 2023 08:14:40 GMT

Just had this thing happening to me twice on S9 Ultra 1tb. Charges very quickly and then it drops very quickly without using it. I can literally look at the percentage and see it dropping by itself minute by minute without using the tablet.

Re: Re: Tab S9 Ultra Battery?

Adrr556 — Tue, 15 Aug 2023 08:21:50 GMT

I assume it would then stabilise and start to drain normally once it got to the true charge percentage near 50%. It definitely looks like a software problem and not hardware I think as once I get it to the true 100% after rebooting, I got three days of use of out of it.

Glad to see it's not just me though.

Re: Tab S9 Ultra Battery?

AntS — Tue, 15 Aug 2023 10:26:05 GMT

Hi guys,

I asked about this at the Samsung side, and have been advised that an upcoming software update should resolve the strange battery charge level reporting. Not much info on the exact version or when, but keep a look out for any software updates coming in the near future, and let us know in this thread if it fixes it or not.

Re: Re: Tab S9 Ultra Battery?

Adrr556 — Tue, 15 Aug 2023 10:33:28 GMT

Thank you :). I'll be sure to post an update if this gets resolved by a SW update

Re: Tab S9 Ultra Battery?

Angelus_nzg — Fri, 18 Aug 2023 08:51:49 GMT

My Tab S9 Ultra seems to be having battery problems. Connected with my monitor to USB C (wich supports display, data transfer, and up to 65W max. charging power) the tablet says it is charging and will be fully charged in something like 3 Hours however the tablet keeps discharging or it charge very very slow.
When I have it connected to the power supply with a charger up to 45W, the tablet reaches 85% (Protect battery function) but drops to 84% instead of staying at 85% connected. It goes back to 85% only if I reconnect it. This didn't happen with my Tab S7+ even in heavy tasks.

Re: Tab S9 Ultra Battery?

Adrr556 — Fri, 18 Aug 2023 08:54:35 GMT

So I received a software update on 16/08/23 and I am very pleased to say that it's resolved!! After 3 more charge cycles it charges and discharges normally with the battery level staying the same after a reboot. It's the August 2023 security patch version of the software I'm now on.

Re: Re: Tab S9 Ultra Battery?

Trashi — Sun, 20 Aug 2023 18:54:01 GMT

I haven't checked for any updates yet, but before I do, I wanted to share what I noticed.
When I plug it in to charge, it says it takes about 1h30min to fully charge (that's with the official 45W charger), but then after about 20mins it reaches 100%.
If I then leave it plugged it for another hour or so, it discharges normally, I get a lot more use out of it.
So obviously a software issue?

Re: Tab S9 Ultra Battery?

Adrr556 — Sat, 26 Aug 2023 07:43:01 GMT

Definitely a software issue as it stopped immediately after that update and has been absolutely fine since