Vacate Law and Legal Definition. Vacate is a term subject to different meanings. In the context of a court order or decision, vacate means to overrule or void. A decision may be vacated for error, however, the error must be significant enough that it affected the outcome.
Because people needed a way to store electricity. The battery was invented around 2,000 years ago if you believe the Baghdad battery discovered in 1936 was a real battery. The Voltaic battery was invented in 1780. The Rechargeable Lead Acid Automobile Battery we use today was invented in 1859.
Inventions of incandescent electric light bulb and of dry battery at the end of the 19th century enabled solution for this problem. First dry cell batter was invented in 1896. It was an improved variant of the previous version in that way that its electrolyte was a paste instead of liquid. Because of that, it could work in any position and it would not break or spill that easily. It was a perfect power source for a portable light source. In 1899, English inventor David Misell invented the first flashlight. It had three D batteries placed in a tube that acted as a handle of the device. Batteries powered a small incandescent electric light bulb and a simple contact switch turned light on and off.