Nickel cadmium Rechargeable Battery (color coded red).
Got my WA 3.5V rechargeable battery on sale. Put it into my 1970s oto-opthalmoscope battery handle and got it working again! Battery handle did NOT heat up when recharging unlike the old battery
Very good price
*Offer excludes Littmann, Welch Allyn & International Orders. Cannot be combined with any other coupon offer.