Walmart offers the Coleman 18-watt Solar Battery Charger, model no. 58032, for $73.18 with free shipping. That's $9 below our January mention and the best price we've ever seen. (It's also a current low by $20.) This amorphous solar charger provides up to 1.2 amps of charging power for your 12V batteries. It measures 42.5" x 3" x 16" and includes battery clamps, four stainless steel screws, CLA adapter, 12V plug, and 12 feet of wire.