On my 12SRT you could pull the key out of the fob(just like the Hellcat) to gain access to the car if the fob stops working. On the 12 you could pop out the push button start and stick the end of the key fob in to the hole and turn it just like a key to start the car.
The question is, what happens with he Hellcat if the key fob stops working? Are we stranded?
Also on the 12 you could pop a little panel off by the shifter and stick the end of the fob in to shift it in to neutral in case the battery was dead or any other reason the car would not run
Found a partial answer to my question...still does not answer how to shift the car to neutral with a dead battery
NOTE: In case the ignition does not change with the
push of a button, the RKE transmitter (Key Fob) may
have a low or dead battery. In this situation, a back up
method can be used to operate the ignition switch. Put
the nose side (side opposite of the emergency key) of the
Key Fob against the Engine START/STOP button and
push to operate the ignition.
page 468 deals with the emergency neutral release. This was on the on line manual
In order to push or tow the vehicle in cases where the
transmission will not shift out of PARK (such as a dead
battery), a Manual Park Release is available.
Follow these steps to use the Manual Park Release:
1. Firmly apply the parking brake.
2. Remove the console storage bin to access the Manual
Park Release lever.
3. Using a small screwdriver or similar tool, fish the
tether strap up through the opening in the console
base.
4. Insert the screwdriver into the slot in the center of the
lever, and disengage the lever locking tab by pushing
it to the right.
5. While holding the locking tab in the disengaged
position, pull the tether strap to rotate the lever up and
rearward until it locks in place in the vertical position.
The vehicle is now out of PARK and can be towed.
Release the parking brake only when the vehicle is
securely connected to a tow vehicle.
To Reset The Manual Park Release:
1. Push the latch (at the base of the lever, on the rear side)
rearward (away from the lever) to unlatch the lever.
2. Rotate the Manual Park Release lever forward and
down, to its original position, until the locking tab
snaps into place to secure the lever.
3. Pull up gently on the tether strap to confirm that the
lever is locked in its stowed position.
4. Tuck the tether strap into the base of the console.
Reinstall the console storage bin.
My 12 had the same fob as my Hellcat. If the battery dies in the key, you can remove the key to unlock the door. To start the car, you need to push the start button with your fob. I know it sounds weird, but it works. I was busy and didn't replace the fob for a few days and it worked like thst each time. You probably wouldn't want to go too long.
My 09 SRT 8 fobs go dead frequently. Dealer advises the fob "constantly seeking the vehicle " and runs it down . ( Think Bluetooth battery drain )
Battery not difficult to change....I keep spares in the glove box and house.
There is, it's a giant yellow tag inside the trunk. Lol. I get what you are saying and when my butt was hanging in the air of my back seat and I was reaching into the trunk, I couldn't have agreed more!