I have 3 Shorai batteries in 3 bikes; and for the last 2+ years. Sometimes they sit for months with no maintenance and work all the time. Recent trip to Alaska (8500 miles), flawless. I live at 7000' elevation and cold weather has not been an issue when sitting outside on 'local' overnights. I have only had to crank once or twice to 'warm' the battery up.
I too have the Shorai charger as my Ducati dealer suggested it, but have only used it when I keep a bike in Phoenix for months. It really wasn't necessary as it went to 'store' within minutes.
So far very satisfied.
Allen.
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