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jerabaul29 / OpenMetBuoy-v2021a

An easy to build, affordable, customizable, open source instrument for oceanographic measurements - with global Iridium coverage
MIT License
37 stars 7 forks source link

cheaper batteries #50

Open jerabaul29 opened 2 years ago

jerabaul29 commented 2 years ago

Would be possible to test cheaper batteries, from EVE or Fanso, which should have the same overall specs:

https://eu.nkon.nl/disposable-batteries/lithium/c-d-9v-size/fanso-er34615m-d-formaat-lithium-batterij-3-6v.html

https://eu.nkon.nl/disposable-batteries/lithium/c-d-9v-size/eve-er34615-d-formaat-lithium-batterij-3-6v.html

jerabaul29 commented 2 years ago

(may request adding a supercap in parallel of the batteries to power the iridium modem)

jerabaul29 commented 2 years ago

FYI @TryggviLab . Would request a bit of tests though. I think the Fanso battery could be a drop in replacement. The Eve battery has a max continuous current that is too low, but may be ok with a supercap or two to help take away peaks of current draw.

Tadiran SL 2780 with supercaps in parallel may also be a possibility, and I think NKON has them in stock with soldering "tabs".

The scary thing is that at low temperatures (-30 or -40), some of these have a lot of voltage drop. So the safest remains the LSH20.