Weincell MRB400 Z400PX PX400 EPX400 RM400 1.35V Zinc Air Battery by Wein

This is an expensive battery but it was the only one that fit. I have a Honeywell Pentax Spotmatic 35mm camera from the early70's. The battery powers the light meter so my choices are limited. I installed the battery and it began working immediately after not using it for 40 years.

This battery works as advertised.

Was looking for a replacement battery for an old Pentax Spotmatic II, and I found. These worked great and brought my light meter back to life. I feel like they last as long as I’d expect - at least a few months depending on how much I’m shooting. I’ve only noticed their life being shortened when I was shooting in extremely cold temperatures, but that’s just how batteries tend to work.

The description of the item confused me and I bought it in error. It did not work nor fit properly into the vintage camera I ordered it for. Never used.

Works in my Spotmatic

Works fine in my 50 year old camera . Seems to last a long time.

Needed a new value for a vintage film camera that I bought from a thrift store. Good and easy replacement once I figured out how to get the battery in.

My battery came and said that it had mercury in it. I also had to take the sticker off for the battery to work on my Honeywell Pentax camera.