Eveready 266 Radio & Hearing Aid Battery
This
Eveready 9 volt No. 266 battery was made for use in transistor radios
and other electronic instruments, including at least one hearing aid.
Eveready was a brand of the Union Carbide Corp. of New York, NY.
This battery
weighed 6.6 oz., (188 g) and measured 1¾" by 1¾" by 2⅜" high (4.5 x
4.5 x 6.1 cm).
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Front view of the Eveready No. 266 battery showing the model numbers
(No. 266) and NEDA 1605.
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Top view of the Eveready No. 266 battery showing negative (left) and
positive (right) terminals.
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Bottom view of the Eveready No. 266 battery.
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Right side view of the Eveready No. 266 battery showing the voltage (9
volts)
and 2 US patent numbers.
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Two Eveready No. 266 batteries can be strapped together in series to
give an output voltage of 18 volts.
This configuration was used in an Ambco Model 951 portable desktop
hearing aid from the mid 1960s.
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