Thomas Edison built a battery more than 100 years ago that was designed to survive for decades. Known as the nickel-iron battery or Edison cell, it was heavy, imperfect, and not ideal for every use — but it was almost impossible to kill compared to many modern batteries. In this video, we uncover ho
28:25
21:35
12:52
17:29
13:00
7:04
9:55
10:52
10:02
21:50
19:48
13:12
17:51
24:42
12:10
227:36
32:05
27:00
18:53
18:56