For the Maruti Suzuki Swift Petrol (above 2012), which features updated styling and better fuel efficiency, the battery requirements remain similar but with slight improvements in capacity to handle additional electrical loads. Typically, the post-2012 models use a 12V 35Ah or 40Ah battery, with common options being the Exide MF 35B20R or Amaron FLO 35B20R. These batteries are designed to handle the improved electronics and provide efficient performance, even with higher power demands, ensuring reliable starts and long battery life.