Topic: Battery depletes while turned off!

Hi everyone, I have a question for you all.
This morning I tried a little experiment: i charged my Switch over night till it reached 100%, than I turned it off (not sleep mode, OFF OFF), came back after 30 minutes, turned it on and the battery was at 90%.
Well, I'm not a battery expert and I really, really never learned even to charge my phone properly, but that is not good.
Am I doing something wrong?
Besides, my WiiU Gamepad did the same thing: I fully charged it and then didn't use it for a couple of days and, when I turned it on, it was blinking red. After no use at all.

Do I really suck that much at using batteries or there's something wrong with my units?
Because everything else seems to work fine!

Thanks for any answers!

The charge dissipates over time. That sounds rather typical for the gamepad, not sure about the switch.

On old batteries that's fairly common. The same day with a new battery? Nope. Try and replicate it and if it keeps doing that, go and get them to give you a new console!

If the device is fully turned off, it should not discharge a LiOn battery that quick! Maybe 1-2% over a couple days sure.

It sounds to be that either the device was really not fully turned off ( some kind of sleep mode ) or a clear defect with the battery.

What probably happend was that if your joycons were attached to it, they charged thus taking battery from the tablet.

Well, thanks everybody for your answers!
I did some further experiments yesterday:
First, I played Zelda for an hour and it went from 100% to 63% (which is kinda fine), turned it off, left it for 5 hours with the joycons on and out of the charging dock and then turned it on again: it was at 75%.
I tried a couple more times with shorter time spans, and every time it went from a lower percentage to a higher one.

I have so many questions now. But hey, it's better than depletion! XD

There's "off," then there is off. I don't believe the gamepad is ever truly off, just in a sleep mode, it still functions as a remote, consuming power even if it isn't being used with the main unit. Go press the TV button and see how quick it is to respond.

@shaneoh Yep, now that I'm thinking about it, the reaction to the TV button is super fast, you are right.
That explains a lot.

@Alessandro_P
Yea, sounds like you had it in Sleep Mode, not off.

@rallydefault Believe me, the Switch was on Off. I guess the WiiU Gamepad has no "off mode", but the Switch was on off.
I hate sleep mode on consoles, for no particular reason, I just hate it. XD

guessing your joycons were not fully charged and they drained the battery.

Try is again without them connected?

@mav-i-am I'm trying it today! i just left my Switch at 95% , but in sleep mode this time, with the Joycons off it. I'll see what happens after coming back from work!

Iv been trying to look this up for a couple of days now. Im in the same situation as u. My battery depletes while turned off. It depletes around 25 to 39%
Somtimes when i turn it on it has 71% left??? Iv even tryed to disconnect the joy cons just incase the system is charging them. The results are the same detached or attached.
Is this happening to anyone els?

So test playing zelda on portable mode. I only get 1 hour and 15mins play time?

I think somthing is wrong with my switch faulty battery??

THIS !

Word for word, I have this exact issue. Today, I picked up my switch off the dock after charging all night... It said it only had 78% left. I made sure it was fully turned off. When I went to play it on my lunch, the battery was completely dead. Ive see it go from 54% then play for an hour then it will tell me I have 75% then just die on me. It has been this way since I first turned it on. We cant be the only ones with this issue...

Well, it's great that this became a good topic of discussion even if it means there are many of us with this problem...
That's how thing evolved in these days and the results of my experiments:
yesterday, I had an afternoon off work so I played Zelda for a while.
I got my Switch on from sleep mode and it was at 92%, so it went from 95% to 92% in 4 hours and it's good.
Then it went from 92% to 35% (more ore less) after 1h and 45m playing, which makes sense.
Then I turned the Switch completely off, turned it on after 2 hours and the percentage was a bit higher, but I discovered that the battery dropped faster for some minutes: I think it tried to balance this "going up issues" it has.
Then everything went fine, played till it turned off automatically from dead battery after 40 minutes or so.

I guess there can be a problem with the battery (even if it fully works for the time it should work) but also that the battery percentage shown on the Switch is not to be trusted completely. I think it isn't very precise.

Also, one more thing I forgot to add: I'm using the Switch at minimum screen brightness, because I think the image at minimum is still very bright. It probably helps, just like it helps on the WiiU Gamepad or the 3DS.
I'll make more experiments in these days!

Just as a note with Li-Ion batteries! Prevent depleting your batteries below 10%!
They cannot handle it well when you deplete them completely a lot! Your battery will be dead within a couple months in worst case or at a significant reduced capacity.

If you want your battery to last, it's best is to recharge the battery when it reaches 20% or so every time.

@Jeronan Well, thanks for the advice!
Much, much appreciated!

same issue here. took my switch off the dock full 100% charge. held power button and powered it off completely. it sat on my couch for about 3 hours or so (work got busy) powered it on and was at 68%. is it using the battery to keep the joy cons charged when they are connected even when powered off?