Hope this is not too repetitive a post, but looking to adding a SteriPEN to my hiking gear which makes it available for everything I might need it for, EDC, travel etc.

Most of the boxes and online descriptions seem so close, that other than a LED screen on one, another runs on AA's instead of CR123's, I'm not sure which would be the best choice. The prices are not all that important as much as realiability and duarabilty for that price point.

I already have a solar charger for batteries so thoses costs don't concern me so much.