If you do go the rechargable way.
Get a torch that is rechargable. With a SMALLer/LIGHTer
than 18650 Cell in it.
Mount the charger beside bed. in lounge. In Kitchen on bench.
and make sure she gets in habit of plugging it in every morning.
and keeps it on a cord round her neck at night till she goes to bed.
Twisty over a push button is preferred by the old arthritic mates I have.
and MID sized torch over S2 or Astrolux AO1 sized.
The old school torch is fine. Twisty and 2 cells (IN LED).
Just wrap some doctors paper tape, or Band aids round the grip part for no slippage and to give a larger dia.
If you were near here I’d give you a couple to try, but I can’t throw ’em that far.