I've used it twice and been impressed both times. I bought a direct battery connector for my Goldwing and took alligator clips with me for my car. I originally bought it to carry the Goldwing on long trips due to its small size and easy packaging. But while working on my car last week, I managed to drain the battery almost to zero. When the car wouldn't start, I plugged in the Powerup 300 and bam. The car started with no problems. The 300 sat on my bike for two months without a charge and still showed a full charge when I tested it before jumping in the car. Really impressed with 300 and would recommend it to anyone. Will be buying it for my wife's car soon.
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