Originally posted by KatManDEW
Should I use Lithium batteries?
Jim is right. The only option I see is to use 2x CR2 Lithium primary photo cells since the 450mAh Tadiran cells are out of production (unfortunately).
Normally you throw the CR2 away after use. They seem to be much cheaper in USA than in Germany, here they are around 6-8?(~US$) apiece. Some people have tried to recharge them with different success (and yes, it is dangerous, you might burn your house etc. etc.)