HS1

Hi I have a PT cruiser 2.2 touring car (2005) I’ve been told the battery needs replacing even though I replaced it 3 years ago. Car keeps not starting. RAC called our, battery reserve is low. Garage has been informed by dealer that Chrysler no long make that battery for the PT cruiser anymore it is obsolete. Garage had managed to find one for £379 (!!!!) Has anyone else heard about this with the battery? It fits under the passenger seat.