No, You do not need a key fob to start a car. When starting a car, you put the key in the ignition and turn. Power comes from car battery, not from the key fob battery!
Dead battery, car will not start
Certainly, a loose wire on the car battery can cause the car not to start.
Get a donor car and use it's battery to start your car. You will need a set of quality jumper cables. Or you can charge the dead battery on the car for about 2 hours with a good 10 amp battery charger.
Weak battery and no gas can both cause a no start.Weak battery and no gas can both cause a no start.
dead battery
If your car battery is dead, you will not be able to start your vehicle without a jump using jumper cables. When the car won't start and the lights on the dash aren't working, it is most likely your battery.
Dead battery ?
Yes, one bad cell in a car battery will cause the car not to start.
from a dead battery to working battery
Do you mean "jump start"? If so, yes- it requires a car with a good battery, and a set of jumper cables- connected the RIGHT way between the two vehicles. With older vehicle, it was possible to "push start" the car with the dead battery- but with modern electronics, and a completely dead battery, will not work.
the only way to start a car when the remote key is dead is to start it by putting the key into the ignition.
Dead cell in the battery or something is on pulling power from the battery. If it is a dead cell the battery must be replaced.