A+MAX UCB450-60, 15V, 90F, 900 Peak Amp Capacitor -40 Degrees Weather Start Car, Truck and Motorcycle, Audio Amplifier subwoofer Capacitor Current Booster. No Need to Modify alternator or Battery

I've been running this super cap for 5 years now and I didnt think much of it until my battery started to die. With the cap attached, I could still start the car, but it cranked over slower. When I started fault finding, I found that with just the battery, the starter didnt even turn over, I just got a "click" and the dash went dead leading to a ECU reboot. When reconnecting the cap, without adding a charger, the cap would take enough capacity from the battery to recharge itself and then I could start the engine again. This saved me having to arrange to tow the vehicle or walk to buy a new battery. I am going to buy one for my other vehicle.

I am very pleased with this capacitor. I stumbled onto it looking for a car audio style capacitor. I'm not technically inclined enough to test and make sure this is 90farad/250 amps as the description states, but it does keep my headlights from dimming pushing 4 12 inch DVC subwoofers with a 2700w RMS amplifier @ 1ohm. It is very simple to use. It doesn't look like your regular style cap but it definitely does the job. Overall, I am satisfied with my purchase.

Added this cap to assist with starting large Volvo Penta 5.5L engines which really hit the battery system hard, now they start better than ever before! Easy install, and couldn't be happier with the results.

I open the product up. It’s five caps, 4awg wire and a switch. It’s definitely overpriced.

This just triggered my ecm and battery light when installed. Had to pay 150 to get the codes scanned. pOS