Keep stored vehicles ready to run with the CTEK 3300. If the battery is low, this compact unit will recharge it at an optimal rate, varying both current and voltage automatically. When battery is fully charged, CTEK will switch to a maintenance mode to keep it in top condition. Clip onto battery terminals or attach connectors permanently to battery and unplug when not in use. Works for all 12V lead-acid automotive-type batteries (including Optima).
Use in combination with our CTEK Comfort Indicator Eyelet for more versatility.