Burgess No. XX30E Hearing Aid Battery The Burgess No. XX30E was a 45 volt hearing aid "B" battery made by the Burgess Battery Company of Freeport, Illinois. It was used in some vacuum tube hearing aids between 1938 and the mid 1940s. It weighed 8.2 oz. (236 g), and measured 4" by 2˝" by 1" high (10.2 x 6.3 x 2.5 cm). | | Click picture for larger view | | | | |