The need for batteries on Christmas morning made itself known in earnest
after World War II, when the first battery powered toys arrived on the market. Those batteries were not rechargeable and lasted only a few hours at most before depleting and then becoming trash. No recharging, no recycling. The batteries themselves might have been relatively inexpensive, but replacing them time and again was not.
All that burgeoning interest has attracted research and development dollars, the incentive being the production of batteries that run longer on a charge, are made of less toxic materials, are cheaper for consumers, and are lighter in weight and in environmental footprint.
The race is on, and with many more things in everyone’s daily lives being powered by batteries than there were 70 years ago, the stakes are bigger than simply making toy cars go faster on Christmas morning.
— Techly