The battery he opens is an A23 12v
You can buy them at Maplin. And they do indeed contain eight 1.5v button cells. I've literally just opened one myself (I had some spares from my car alarm fob). Here's my proof if you need it:
www.twitpic.com/rh871
But yes, don't open up any other batteries. This one unrolled very easily with the tip of a pointy knife - DON'T use force on this or any other battery.
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Peregr1n @peregr1n, Sun 29 Nov 2009, 18:38,
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