- 1). Grip the Welch Allyn handle where the head connects to the body of the unit. Turn the head counter-clockwise to loosen and remove it from the body.The metal transformer will now be visible at the end of the body of the handle.
- 2). Turn the transformer assembly counter-clockwise to loosen and remove it from the body of the unit. The battery will now be visible in the body of the unit.
- 3). Turn the handle upside down, and the battery will slide out of the body.
- 4). Slide a new battery into the body of the handle, making sure that the terminal end of the battery is up.
- 5). Replace the transformer and head of the unit.