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Size C won't provide as much amperage over time as the Ds; ie, they
won't last as long.  The Ds also can supply more peak amperage, but
that usually isn't a consideration with lights.

Alkaline batteries usually last longer than carbon-zinc batteries,
but there can be subtle changes in size that can make them less
suitable.  Everready "Classic" batteries are the old-type carbon zinc
for which American instruments would have been designed.

Fred

On Feb 11, 2007, at 8:04 PM, alex wrote:

>
> As I understand the batteries exactly fitting this sextant MkIX
> are not produced anymore.
> What sort of batteries can be used?
> My (superficial) investigation shows that C-size batteries
> are likely to fit in diameter. How many are needed?
> The batteries only have to feed 2 bulbs.
> Are these 3 volts or 1.5 volts bulbs?
>
> In general, what is the difference between size C and size D
> batteries? Both are 1.5 volts, but size C is smaller.
>
> Alex.
>
>
> >


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