jan 2, 1949 - the alkaline-manganese battery was invented
Description:
a man named Lew Urry developed the small alkaline battery in 1949. alkaline batteries can last for as long as 7 years on the other hand zinc batteries can only last anywhere between 1 to 3 years before becoming unusableAdded to timeline:
Date:
jan 2, 1949
Now
~ 75 years ago
