What size battery for 2007 chevy impala?

The size of the battery that the 2007 Chevrolet Impala needs is Group Size 35, 720 CCA. The battery sizes are standard and are set by Battery Council International. The size takes into account the height, width, length and polarity. CCA stands for cold cranking amps and it is the battery's ability to start, especially in cold weathers and the higher the CCA the better. For the Impala the battery should last anywhere froM3 to 5 years depending on the usage and the climate driven in. You'll know when the battery is going bad when it is harder to start the vehicle, especially in colder weather. The cost of a new battery is anywhere from $130 to $200 depending on the brand.