I'm going to be contrary here. There is a lot of hype and spec flying around at the moment about EMP that is not completely accurate, to be charitable. I can offer objective and hard facts, but instead of saying "trust me", I'll do a little checking to see if there is more accurate and objective information readily available on the internet and get back on the thread if I find some open source info to share.

Tom

PS - AFAIK CR123 batteries have no internal electronics and are strictly primary cells. Secondary cells (rechargables) MAY have internal electronics - most don't - but certainly some recent lithium chemistry secondary cells do have internal electronics. Easy to check and if you don't know the answer, you probably aren't using batteries with internal electronics.