Camera Battery Holder

I was sick of these batteries always getting lost in my camera bag, so I created this little holder, It will need some extra supports added to make is stronger but for my needs it's fine, Designed to hold NP-330/f550/f570 Li-ion 7.4v 2900mAh 21.5 Wh Battery Packs, Used for both my on camera light, and 7" HD Camera monitor screen.