Welch Allyn 2.5V Rechargeable Battery (Red) (72000). This Welch Allyn 72000 2.5V Nickel Cadmium Rechargeable Battery, color-coded red, is for the following Welch Allyn handles: 60700, 60710, 60715, 60713, 70700, 70710, 70715, 70720, 70750, 70751, 70754, 70755, and 71500. Price per each.