Here are a few battery options for your Volkswagen Polo Vivo 1.4 that should work well: The Mecer 100AH 12V Deep Cycle Battery (SOBA100) for R3050 and Mustek 100AH 12V Deep Cycle Battery - Gel for R2719 would both be suitable replacements for your car's battery. As deep cycle batteries, they are designed for high discharge applications like vehicles and should provide reliable starting power. The Mecer and Mustek are leading battery brands and offer great value at an affordable price point. Let me know if you need any other details on these options!