The best invention of all time is a very debatable topic. Because there are lots of inventions and there are very useful ones. But in my opinion the best invention of all time is electronic cars.
Electronic cars are very useful and it is very eco-friendly. You do not need any gas and because of that you do not need to pay for gas. Electronic cars are eco-friendly too. Normal cars use gas and it produces exhaust and it pollutes the air. However electronic cars do not produce any exhaust and it does not pollute the air. Electronic cars also have technological tools in it and it can auto drive with just a button. Electronic cars use batteries to charge in charge stations. They are very useful but they can have advantaged and disadvantages.
One of the disadvantages of electronic cars is lack of charging stations. Since there are few or no charging stations in Turkey and some other countries. Another disadvantage is long time of charging. When you go charging you need to wait for a long time. Although you can buy chargers to your house but it is very expensive.
We can improve and find solutions for these disadvantages. We can put solar panels on top of the cars and it can automatically charge itself while driving. Because of that you do not need to go to any charging station or you do not need to buy chargers. If we do this thing to electronic cars, we will improve it and it will be perfect. Also, if we produce these cars for long and if we produce many of them it will be more cheap and more common.
In conclusion I think the best invention of all time is electronic cars. It is useful, eco-friendly and if we improve it by putting solar panels on it, it still be the best invention but more improved and perfect.