Topic: Super Nintendo Controller for switch - battery drain when not used

Hey all. Quick question
I have the official Super Nintendo controller for Switch.

Twice now, I have picked it up after perhaps 3-4 weeks of not using it, and the battery is dead.
It charges up fine. I charge to full, I then use it for maybe an hour.
I come back to it 3-4 weeks later untouched... battery is dead again

Is this controller battery incredibly small?
Does it discharge over time unused?

This is very un-Nintendo. My GBA, DS and 3DS consoles last months (years!) in the draw untouched, and power on fine. My pro controllers likewise last forever, whether used or on the shelf.

Do I have a dud?

All thoughts appreciated
Thanks

Did you contact Nintendo Support as if it would fall under Warranty Support for this issue. Are you sure the buttons aren't in a position where they are being pressed as well. And what device are you charging them from?

@JamesNighthawk Mine also do this - both the NES and SNES controllers. I just assumed they used lesser internals for these special controllers. If this is not normal behavior, that would be good to know, though I doubt I'll be able to get them fixed/replaced at this point.

My original and Splatoon 2 Pro controllers never used to do this, but after the update that added the find controller feature they would die a lot faster when going unused. The Xenoblade 2 and Smash contorllers are the same. I don't know if they'll be completely dead by 3-4 weeks though. I think mine might last longer than that, but I can't remember. I always assumed that, since that feature was added, the controllers are constantly consuming more battery than they used to in order to be able to receive a signal from the console to turn on and start vibrating.

Thanks girls and boys.
My guess is that the battery inside is much smaller than with the other controllers. It doesn't need to vibrate, or do as much in general. So, the general drain in idle is down to zero quicker.
In a way I am glad to hear it is "normal" behaviour. I don't have to return it this way!