Originally Posted by SapInMyBlood

You mentioned not wanting to pay a price premium :
-Most phones are waterproof nowadays
-Quadlock case and mount is about $60
-Adding to the low battery thing, a $20 2000maH battery bank could resolve that.

Just an idea! Or use your old smart phone for this purpose if you have one lying around. Find a cheap one on FB marketplace, etc. It's basically a glamorous cycling GPS

Otherwise, you're looking at $150-200 + for a cycling computer that can do that, like the Garmin 130

I'm hoping someone knows of an obscure Lezyne or Bryton that might do the trick for you

Edit: Lezyne seems to have a few that would work for you

https://www.ebay.com.au/itm/164156973496?chn=ps&norover=1&mkevt=1&mkrid=705-139619-5960-0&mkcid=2&itemid=164156973496&targetid=921373331726&device=c&mktype=pla&googleloc=9070761&poi=&campa ignid=9772799706&mkgroupid=100117146216&rlsatarget=aud-692203741102la-921373331726&abcId=578876&merchantid=7364522&gclid=Cj0KCQiAyoeCBhCTARIsAOfpKxjY99P2EhfMYdu1Vj82X52BH GaXPR1_3OrgKbqLl2gVAeYZZA6cjp4aAqCUEALw_wcB