I have two bikes that will be stored most of the winter – I am looking at getting a trickle charger for each to keep the batteries charged (a Yamaha 50 electric start and an 05 Vulcan 500). What are your recommendations for unhooking the battery vs keeping it wired up? Any good recommendations for a brand that works good – what should I look for? I am looking at one Advanced auto parts offers Advance Auto Parts - In-Store Specials it is a SCHUMACHER Fully Automatic Battery Charger for $24 – does anyone have this one – are you happy with it – any other recommendations?