For the time being, this seems to be a simple task. Some promise start-up aid via the “cigarette lighter”…3-digit currents via a fuse that appeals to 10Ampere??? There are many products in all price ranges that are priced as “egging wool milk sow”. I want to start either a 2.5l petrol (subaru) without battery monitoring or a 2.0 petrol with battery monitoring (Skoda MJ 2020) in case of an emergency n. Practicality / functionality is more important to me than the price. What can you recommend to me???