SwatchBattery has a lot of coin type batteries. http://swatchbattery.com/ . My 2002 300M remote uses a CR2016 (3volt) battery which they carry.
Possible weak remote battery or failed remote.
Just call Parts, the battery costs $6.00 you can replace it yourself.
To change key fob battery in 2011 Chrysler 300, simply release the cover by using a screwdriver to take off the battery cover. Then, replace the old battery with a new CR2032 3V/225mAh Lithium coin cell battery. Slide the cover back on and screw the little screw in place.
Use your key to unlock the door and then pull the hood release.
Use the key??? There are jump start points under the hood.
To replace the battery in a Chrysler 300 key fob, first, locate the small slot on the side of the fob and use a flathead screwdriver or a coin to gently pry it open. Remove the old battery, typically a CR2032 or CR2025, and insert the new battery with the positive (+) side facing up. Once the new battery is in place, snap the fob back together securely. Test the key fob to ensure it is functioning properly.
The system will reset when the proper key is put in the ignition and turned on.
To change the battery in a Chrysler 300 key fob, start by using a small flathead screwdriver to gently pry open the fob along the seam. Once opened, remove the old battery, noting its orientation, and replace it with a new CR2032 battery, ensuring the positive side is facing up. Snap the fob back together securely, and test the key fob to ensure it works properly.
Either unlock the doors with the remote, or unlock any door with the key.
The fob may be defective or it may have lost programming.
The Honda Accord remote key does have a battery.
The Chrysler 300 key FOB must initially be programmed at the Chrysler dealership. You can use the Chrysler dealership FOB code to change the initial code to your personal code.