Comment on Why is amperage more "obscure" than voltage (or watts)?
Decq@lemmy.world 5 hours ago
Many batteries these days are rated in Ah, so that’s something.
One reason is because most power supplies are voltage supplies and not current supplies. Though they do report the max current they can supply. Also voltage is in those cases is (arguably) more important. The wrong voltage and it probably won’t work at all or even breaks. Whereas to little current, it probably still does something, though at reduced power or it cuts off at some point.
Iconoclast@feddit.uk 4 hours ago
Ah, or mAh might be a little confusing though - two different batteries can have the same Ah rating but wildly different capacities.
I always convert everything to watt-hours by multiplying ampere-hours by voltage.
Decq@lemmy.world 3 hours ago
It is confusing, but it is what they do. I’m not sure why they do it. Probably marketing reasons, seeing as a lot of people think bigger number == bigger better. Of course if you know the nominal voltage of the battery pack it’s not a big issue. But yeah Wh or Joule would be better.