Using an undersized car battery can lead to starting problems. Batteries come rated by their life expectancy as well as their CCAs (cold cranking amps). A battery’s CCA defines its ability to start the engine during cold weather. Plus, an undersized battery may not have enough fluid to power your car’s accessories, particularly while your vehicle is turned off. Regular short trips take an even larger toll on small batteries. Instead of carrying a share of the load, the battery is constantly drawing a charge. This might lead to alternator overheating and prolonged damage. Several problems can occur from using a battery that is larger than your vehicle’s battery compartment as well. As manufacturers, we precisely match the alternators and batteries to the vehicle’s power requirements. A mismatched battery-alternator combo could make your alternator overheat and shorten its lifespan.