worth noting that there are many casio watches that are very similar to the g-shock series but are not g-shock.

they're probably worse but still incredibly good. I have one of these (W-735H-1AV - https://www.casio.com/intl/watches/casio/product.W-735H-1AV/)... Got it for ~20 euros off amazon in 2018 and it's still rocking.

I never had to change the battery (so far) but I had to change the straps twice.