A battery cut-off is a good idea to allow you to easily remove parasitic loads. That way you're only concerned about its self discharge rate. When my Banner died (impact damage, not the usual) I replaced it with an AGM battery, they tend to have a lower self discharge rate so are better for my (sporadic) usage. I think mine is intended for use in a large mower actually. it's lighter, smaller and cheaper than a banner. it's been in for 6 or 7 years now and has no trouble starting the 7 after being ignored for 6 months in the winter. i don't leave it on a tender.