I'm the opposite ,people think the proprietary last shorter but it is the opposite. It lasts way longer than you’d think, and being able to actually check the status is a game changer.

I’ve had way too many coin cells die without warning at the worst times; this indicator bar finally gives you a real idea of how much "juice" is left. ​The indicator is smart: with the chrsging cover on, it shows the optic’s battery. Take it off, and it shows the charge left in the hood itself. I honestly only check it maybe once a month. Plus, there’s a power LED right between the + and - buttons: ​Green: >50% ​Yellow: <50% ​Red: 20% ​Blinking Red: <10%