Conversation

Notices

1. Alfred M. Szmidt (amszmidt@mastodon.social)'s status on Monday, 13-May-2024 12:59:37 UTC Alfred M. Szmidt

   in reply to

   • Santa Claes 🇸🇪🇭🇰🎅

   @clacke The two have vastly different purposes and meaning (Ah being how long you can abuse the battery for, which Wh does not convey), plus bunch of standards mandate it AFAIR.

   • Santa Claes 🇸🇪🇭🇰🎅 (clacke@libranet.de)'s status on Monday, 13-May-2024 12:59:37 UTC Santa Claes 🇸🇪🇭🇰🎅

     in reply to

     > vastly different purposes

     why

     > standards mandate it

     why 🤣

     @amszmidt

   • Santa Claes 🇸🇪🇭🇰🎅 (clacke@libranet.de)'s status on Monday, 13-May-2024 12:59:39 UTC Santa Claes 🇸🇪🇭🇰🎅

     in reply to
     10 Ah * 5 V = 50 Wh

     
     Is that how the mAh rating on powerbanks works, or is the A meant to be at the internal voltage like 7.2 V or something?

     Why do they even use Ah? Use Wh instead and avoid this confusion.

     (the world is not ready for powerbanks rated in J)

   • Santa Claes 🇸🇪🇭🇰🎅 (clacke@libranet.de)'s status on Monday, 13-May-2024 12:59:40 UTC Santa Claes 🇸🇪🇭🇰🎅

     A 10 000 mAh powerbank fully charged contains 2 nanograms of electric potential.

     e = mc²

     10 Ah * 5 V = 50 Wh
     50 Wh * 3600 s/h = 180 000 J

     180 000 J / (300 000 000 m/s)² = 2*10⁻¹² kg