The Science of Batteries: Powering the Modern World

Batteries store energy through chemical reactions that move electrons.
They have two electrodes—anode and cathode—separated by an electrolyte.
When connected, electrons flow through a circuit, powering devices.
Rechargeable batteries reverse the reaction when plugged in.
Lithium-ion batteries dominate phones, laptops, and electric cars.
Alkaline batteries are single-use, common in household gadgets.
Energy density measures how much power a battery can hold per weight.
Solid-state batteries promise higher safety and longer life.
Battery recycling recovers valuable metals like lithium and cobalt.
From flashlights to spacecraft, batteries drive modern technology forward.