[Nicko]

Found this list of batteries that are used in 2014 Jeep Grand Cherokee. Moreover, it has the information for every engine installed! Hope it will be helpful

    Chrysler / HEMI / Third Generation / 5.7L HEMI EZH
        Displacement – 5.7L V-8
        Battery size – H7-AGM 
        Cold Cranking Amps – 850 A Dimensions (LxWxH) – 12.375 x 6.875 x 7.5 in.
    Chrysler / HEMI / Third Generation / 6.4L HEMI
        Displacement – 6.4L V-8
        Battery size – H8-AGM 
        Cold Cranking Amps – 900 A Dimensions (LxWxH) – 13.9 x 6.8 x 7.5 in.
    Chrysler / Pentastar / 3.6L / ERB
        Displacement – 3.6L V6
        Battery size – H8-AGM
        Cold Cranking Amps – 900 A Dimensions (LxWxH) – 13.9 x 6.8 x 7.5 in.
    VM Motori / 6-Cylinder / A-Series / A 630 DOHC
        Displacement – 3.0L V-6
        Battery size – H8-AGM
        Cold Cranking Amps – 900 A Dimensions (LxWxH) – 13.9 x 6.8 x 7.5 in.