Can she manage a TV remote? Can she manage a cordless phone? If she can't and gets mixed up, she will not be able to run the chair either. Been there. Done that.
Get a chair or recliner that fits her. Measure from back of her knees to the floor. Then measure her knee to back side when she is sitting. this way she can get up because her feet hit the floor and she wont be able to scoot back too far. My Mom picked out her own small recliner before she got dementia and I am glad. She is only 5' tall. They have chairs that are recliners and they dont even look like it! Good Luck, remember one day she wont walk and you will be putting her feet up a lot so a recliners come in handy.
I don't know how big or capable your person of 93-year-old is but an electric chair is a liability not an asset. My sister ended up falling out of the chair in its 'up' position. And I'm also in full agreement with pamstegman . . . if she can't operate remotes, this chair is not a good solution. I'd start shopping around for a chair that fits the person. If they can walk, take her with you. This way it will become 'her' chair.
I got an old electric chair from a friend for mom, now for dad. It has just a simple lever to adjust positions. I have layered double memory foam on top of the seat and the back, plus he has a "donut" seat cushion. The back sometimes is too far back and I have to add a pillow when he eats. I have just switched to water proof covers (Bryant Home) reversible washable to be easier to clean spilled food, sweat, and sooner or later pee. (sometimes also listed for pets) My Dad likes his heating pad, so one with heat would be a recommendation. I got a mailing on recliner/risers and some go into sleep position, and or zero gravity (feet raised above heart level). I would also recommend cloth, covers and cushions would slip around on vinyl or leather. And yes, size matters, both for comfort and also to fit into a room. I would say the smaller the space it takes up the better, esp if she moves to a home later. Keep in mind it will be stretched out most of the time.