Harbor Freight does carry a trickle charger that is "styled" very much like the Battery Tender but at less than 1/2 the price ($15), don't know if it is the "private label" version, but very likely...! Personally I went with the more rugged Battery Tender made for the JetSki crowd, $45 but is potted so it is moisture and drop resistant...I do get rather butter fingered when working around the bike in the garage.