Very nice CT modifications, I am sure the big battery can last over 350k+ KM, I am in US and driving my 2011 Prius with over 224k+ miles still with the original battery, as long as the car is using daily/weekly then the battery will last until it's end of life, I will replace mine once it hit 250k miles regardless. Keep up the good work filming this type of modification vlog. 👋👋👍