The other week my digital caliper started blinking at me to tell me to change its battery. But it has always bothered me to have to but a $4 battery into a cheepie $16 caliper. Then by chance I ran across an article about how some batteries are made up of a bunch of these button cells.

So I decided to check it out. Bought a 12V battery,

And then proceeded to cut it apart. Where upon I found it was

However they where unfortunately a smaller in diameter then what I needed. But no problem that is why we have lathes. So I just turned up an adapter ring to make the cell fit.

Naturally I donâ€™t expect one of these little cells to last as long as the correct one, but

So I decided to check it out. Bought a 12V battery,

And then proceeded to cut it apart. Where upon I found it was

*indeed*made up of 8 button cells.However they where unfortunately a smaller in diameter then what I needed. But no problem that is why we have lathes. So I just turned up an adapter ring to make the cell fit.

Naturally I donâ€™t expect one of these little cells to last as long as the correct one, but

*8 of these little cells*I presume will last substantially longer. We shall see. These eight cost the*same*as one of the correct size.
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