Sony Dual Battery Holder

thingiverse

I was fed up with my extra batteries jingling loose in a pocket of my backpack: every time I would reach for my phone, headlamp, or climbing gear I would be on edge about losing them. This case keeps the batteries together in an ultra-space-efficient orientation, and two effortless spring-clips hold them securely in place. Just pull back the tab, and shake the battery out into your waiting hand!