Upgraded aftermarket car battery systems offer greater power capacity, longer lifespan, and enhanced charging capabilities compared to factory-installed systems. This increased power capacity can provide more extended periods of power for various devices, such as lights, refrigerators, and other essential equipment. Additionally, car battery upgrades can withstand the rigorous demands of off-road travel, providing reliable power even in harsh environments. They can also be customized to suit specific overland setups, providing flexibility and versatility in terms of power requirements and charging methods.