With mine I filled it with stabilized premium fuel and put it in the shed covered up.
Took the batteries out last year but have decided to leave them in and put the tender on them to freshen them once or twice during the winter
"If you are the smartest one in the room, you are probably in the wrong room"..
His - 2006 KLR Red, 2010 F800GS 30th Anniversary edition
Hers - 2003 KL250 Super Sherpa Green, 2010 F650GS Biarritz Blue Metallick