I bought a bunch of eneloop pro, but using them in connected thermostats is always displaying “low battery” even after just fully charged. This is when I discovered that they are actually 1.2V

It really came as a surprise, is there a catch? Are they only good for low power stuff like remote controls?

Edit: it seems they do exist in lithium. Question remains why are the NiMH only 1.2v and why are they the most widespread?

  • juliebean@lemm.ee
    12·
    20 hours ago

    my understanding is that the nominal voltage you get out of a cell is always dependent on the chemistry it’s using. alkaline battery cells are always 1.5V until they run down. even a 9V battery is actually six little 1.5 V cells in series in its little rectangular box. NiMH cells are 1.2V. Lithium batteries are actually a variety of different chemistries, but i think all of them have upwards of 3V nominal voltage, so they wouldn’t make a good drop in replacement either without some kind of voltage regulation circuitry.