How about the Polaroid Polapulse batteries?

"Peter L. Peres" wrote:

> Sean,
>
> you probably want the 12V batteries used in kefob car alarm remotes. You
> can dismantle them to reveal 6 standard coin cells stacked. (but I did not
> say this). The operation will save some weight. The lightest kind of
> battery for this will likely be 3 CR2016 lithium coin cells stacked giving
> 9V at <15 grams weight. They will likely support 30mA for a short time.
> FYI the quartz watches with alarm draw up to 50mA with the alarm and light
> on.
>
> Peter
>
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