The Widex Mind m uses size 10 hearing aid batteries.
The Widex Mind 9 has a telecoil, a dedicated volume control, a push button, and uses size 13 hearing aid batteries.
The Widex Mind 19 has a telecoil, a dedicated volume control, a push button, and uses size 13 hearing aid batteries.
The Widex Mind X has a telecoil, a dedicated volume control, a push button, and uses size 312 hearing aid batteries.
The Widex Mind CIC uses size 10 hearing aid batteries.
The Widex Mind IIC uses size 10 hearing aid batteries.