Which batteries for 41CV?

[HP67]

Thanks again to everyone for comments and links!

I saw the UK site but so far I have not found anything with a recognizable brand name. I'm concerned about nameless Chinese batteries (not that I have any illusions that the actual batteries aren't all made by one company and rebranded) just that without any reputation to worry about and no warranty, if it ruins an irreplaceable calculator it would be bad news.

Staying with the Duracell alkalines at this point until something more promising comes along.

Calculator arrived at local shipper today.. hopefully I will get it soon.

Thanks!