Zinc air batteries for SR T's

Does anyone know about "zinc air" 1.35 volt batteries as being a good

replacement for the old mercury 1.35 volt?

 

Thank you

They work fine. They just don't last as long. If they are built for hearing aids they last about 4-6 months. If they are the Wein cells (which have smaller holes so they don't dry out as quick) last about 1 year. I used to get 2-4 years out of mercurys.

 

Steve

Wanted to add a caution. Zinc-air batteries need about 6-12 hours of exposure before you use them in camera. During this oxidation startup they may aspirate some residue, and this residue can be corrosive. Don't immediately put them in camera right after you take the tab off.

I recommend picking up one of these:

 

http://www.criscam.com/mr9.htm

 

I have one for my SR-T and it works quite well.

I've had acceptable results with print film using a regular 1.5v battery and down rating the ISO a bit.

Thanks to all for the good info.

To Chris, how much do you decrease the asa/iso? %?

Jim, If I am shooting 200 I will set film speed to around 100. With 400 I try to set it roughly midway 200 and 400. On other occasions I've simply left the ISO as-is. The .15 volt difference isn't too drastic, especially when using an older alkaline battery.

 

Adjusting the ISO is a much easier trick to pull on my Hi-Matic 7, which uses a slider under the lens barrel to set film speed rather than a dial.

 

Good luck. The SR-Ts are a real pleasure to use in this age of auto-everything WonderCams.