Will a higher CCA hurt my car?
Having more potential current available will not hurt the car's electrical system. It may actually provide for slightly faster starts, with less wear on the starter motor, but in most cases the difference is not significant enough to worry about. via
Can I use a battery with higher amps?
In short, using batteries with extra energy capacity will not harm your device, but would, instead, power the device for a longer time (all other considerations unchanged). via
How do you check CCA on a car battery? (video)