NOCO GBX55 Boost X 1750A 12V UltraSafe Lithium Jump Starter. GBX55 1750A 12V Boost X UltraSafe Jump Starter. GBX55 Lithium Jump Starter. This isn't an upgrade— it's a whole new series. The yellow power LED indicates the 60-second sequence is over and can be reset if another jump start sequence is needed.
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