Cold weather always brings on the question, should I install the biggest battery that will fit in my vehicle? At one time the answer was yes but no more. Today’s vehicles have limited air flow under the hood and your battery needs the insulation and space required to stay cool, heat will actually destroy a battery quicker than cold weather. So stick to the size battery that is called for. As far as more amperage here again the modern vehicle is working with a limited output alternator and if the battery capacity is too large the alternator cannot keep it fully charged thereby limiting the life of the battery.Today’s batteries because of advancement in engineering are smaller and lighter, also the electronics in today’s vehicles are less power intensive. Many of the drivability sensors are 5 volt and with the advent of ground control the power requirements are less than older vehicles. Some of these advancements were to save money but they also saved weight and space to make the cab forward design and front wheel drive possible.The donut spare was another size and weight advancement. Of course plastics and, many other advancements also helped.