Neat News 2019 (added 2021-07-11)
Recyclable battery

© Materialgeeza
Typically batteries contain toxic materials that are a problem when they are released into the environment. Now a new battery has been developed that is made using a standard 3-D printer and that is biologically degradable, since it consists only of cellulose, carbon, glycerine, and salt.
related: #biodegradable #battery