Craftsman 12V 3 Amps Fully Automatic Automotive Battery Charger/Maintainer $27.25

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Amazon [amazon.com] has CRAFTSMAN 12V Fully Automatic Battery Charger and Maintainer (CMXCESM260) on sale for $27.26. Shipping is free w/ Prime or on $35+.

Product Description from Amazon[LIST][*]MICROPROCESSOR CONTROLLED: After gathering information from the connected battery, the microprocessor adjusts voltage and charge, allowing fast charging without negatively impacting battery capacity and longevity.