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12V lead-acid battery and advises what action is required. With no need to disconnect the battery from the vehicle, the patented technology used by the CTEK BATTERY ANALYZER is safe for the user and vehicle electronics. It is reverse polarity protected, creates no battery loads, heat or sparks.
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CTEK. CTEK 1. Connect the red clamp to the positive battery terminal. supply chargers to more than 60 countries throughout the world. CTEK is 2. Connect the black clamp to the negative battery terminal.
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