You know that you’re a weather station geek when…
…you get excited about a sale on Energizer Ultimate Lithium batteries. 
…you know that it takes Amazon 3-5 days to ship them ground because they can’t send them via air freight.
…your battery card graph nose dives quicker than the stock market in 1929 when the batteries drop below 3.00 volts. 
…you’ve written Jeff Bezos an email asking why 12-packs are not available via Amazon “subscribe & save,” but 8-packs are.
…you buy a 12-pack when you only need 8 batteries, just so you have a head start on the next battery swap.
…you have ever plotted battery voltage versus ambient temperature for entertainment on a frigid winter morning…