Review on Boost Your Car's Audio Performance with NIPPON ACAP2000 2.0 Farad Power Capacitor by Edwin Kreps

Bought 1 and worked fine for about 10 days then got lost and stopped holding a charge. Came back for a second and number 2 didn't charge above 9.8 volts. I thought the resistance was bad so I used a test bulb instead of a resistor to charge and after about 6 hours of charging it still didn't go above 9.8 volts. . Picked up another cap locally, charged fully and has been working fine ever since. I've never had so much trouble with power caps.