https://knowledge.growingthecommons.org/ 2026-05-06T04:10:25+00:00 https://knowledge.growingthecommons.org/ https://knowledge.growingthecommons.org/lib/exe/fetch.php/favicon.ico text/html 2026-04-04T12:43:27+00:00 Anonymous (anonymous@undisclosed.example.com) https://knowledge.growingthecommons.org/doku.php/batt/batteries?rev=1775306607&do=diff This topic is part of Power & heating. Batteries ---------- ""Batteries are the most dramatic objects; other things stop working or they break, but batteries... they die." - Demetri Martin" What are batteries? Batteries are units containing various combinations of metals and chemicals, between which occur reversible chemical reactions to store and then provide electrical power on demand. Some of the metals and chemicals can be quite nasty and toxic (e.g. cadmium).