I'm considering the purchase of an MFi controller for my wife to play games on our new Apple TV.  There are already several games I know she'd enjoy playing.  She does have years of couch gaming experience via Xbox-360 and Xbox-1, so this is not entirely a new concept to her.

However, where I have a concern is that she is accustom to the fact that game controllers on console systems do not need to be "turned off", they switch off automatically when you shut the console off.  Bearing this in mind, I feel it is very likely that my wife just won't remember to switch off an MFi controller when she finishes playing a game.  She's going to treat this like an Xbox controller and just set it down when done.

My question is, do any MFi controllers go into a stand-by or low-power mode (or even shut completely off) after a certain time of inactivity?  As in, if she leaves the MFi controller on and then a day later grabs it to play a game again, will the battery now be dead?

Before I make a purchase, I'm trying to learn if all MFi controllers are alike in this regard.  Over time I'm sure she'd start to remember this, but, I'm concerned that after the 2nd or 3rd time of wanting to play an Apple TV game only to find the controller dead - she'd just give up on playing Apple TV games altogether.