12V8AH battery can start 4500cc car more than 10 times...Sure? Taking advantage of our Spiral Wound battery's great starting current, we have newly Developed a product-- mini supper power Jump starter. Inside Battery type: Spiral wound battery 12V4AH--suitable for starting cars with engine below 2000cc 12V8AH-- suitable for starting cars with engine above 2000cc-4000cc Function: Power starting, USB DC output, LED light, 150W inverter (for choice) Advantages over the conventional jump starter: 1. Excellent CA & CCA: 12V4AH CA: 80A CCA: 60A Starting Current 350A Peak Current 560A 12V8AH CA: 140A CCA: 120A Starting Current 800A Peak Current 1280A 2. 12V4AH can replace normal 12V12AH-12V18AH SLA battery 12V8AH can replace normal 12V18AH-12V28AH SLA battery 3. It can perform well in low -40C temperature environment