If you have a car you don't use every day, just connect our CTEK 3300 battery charger and forget it. If the battery is low, the compact unit will recharge it at an optimal rate, varying both current and voltage automatically as it charges. When the battery is fully charged, the CTEK will change over to a maintenance mode to keep your battery in top condition. Clip onto your battery terminals or attach connectors permanently to the battery and unplug it when not in use. Dim: 7" x 2-1/4" x 1-1/2";
for all 12V batteries (including Optima).
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