How to safely carry battery for my flashlight?

I have an Olight S1R baton that I want to carry around in a pouch with other items.

Problem is, it keeps turning on by accident, even though I ‘locked’ it. I want to avoid melting anything, so I’m thinking about taking the battery (RCR123A) out while in the pouch.

I think I should put the battery in some kind of case then? I found a silicon case for single 18650 batteries, but nothing for this smaller battery.

Have any of you dealt with a similar issue? How did you solve it?