The battery condition is critical to the operation of the car as many functions - ignition, steering, sliding doors, air conditioning all rely on the battery being up to scratch. Even if the battery is OK it is possible to get yourself LOCKED OUT of the car.
as I see it, precautions that might be taken against getting locked out are:
Please help!! The key fob will not operate the door either electronically or manually. I have also tried the spare. When I put key into door handle and turn I can not even hear an unlock click. I am locked out of the car....any ideas?
This is not a good situation to be in. The only obvious answer is to break a window (some say the driver's door window; some say the small window by the rear seats) so you can get the ignition key in the lock and start the car. This seems to clear the problem however see below for two less damaging solutions.
This can happen:
Do not open the bonnet, lock the doors and take the battery out because if you (or some helpful assistant) then closes the bonnet there is no easy way of opening the doors or tailgate.
Shows the bonnet release (under the left-side dash) LHD car shown
The release is in same position on RHD cars - underneath the passenger side glovebox
BUT you won't be able to access the bonnet release if the doors are deadlocked (the default) and the battery goes flat.
Another way out of this situation will involve grovelling under the car as follows: do wear glasses in case there is a spark or oil drops into your eyes.
Þórleifur Ugluspegill Ásgeirsson has been there, done that. Not quite as hard as he thought.
If you have set this up beforehand, then this simple emergency release can get you out of trouble
. . . . . . and pulled through to just behind the bonnet - or maybe routed down to somewhere under the car
David Porter got in by jacking up the front left side; removing the wheel and splash guard, and reaching up and tugging the release cable.
Stuart Preston got a local locksmith out who "opened the car in under 5 minutes" without breaking a window.
Chris Reid has opened the door with a key and helped another person with this method:
Insert key; turn to unlock position and hold there while you pull the door open