Batteries using aluminum with Oozeq polymer electrolyte.
Oozeq and aluminum foil form an inexpensive, safe and easy to make low power battery. Alternatively, a penny or a little graphite may be used in combination with the Oozeq and aluminum.
Aluminum battery technology is being developed as an environmentally friendly, low cost, light weight alternative to current lithium based batteries.
Other simple batteries are more complex and utilize a combination of zinc and copper metal pieces and a cup of salt water based solution, a potato or a lemon to allow students to build a simple battery.
Experimentation is ongoing to build supercapacitors and larger rechargeable batteries using aluminum foil and Oozeq.