I'm not worried at all... This winter, here in my part of the U.K., we had snow that lasted 2 days, all winter. I've lived in this house 18yrs and in all that time the longest I've been off the road due to snow was an 11 day stretch. I was thinking about countries elsewhere in Europe that become snowbound for months at a time, or Scandinavia.
Guess it wasn't obvious, but what I meant was, "If 'one' is worried about any draw on the battery."
But for me, it's not just snow that keeps me off my bike. It's cold weather too, and rain. Just not into riding in the cold or wet anymore. And with the wild winters we've been having around here lately, snow, sleet, cold cold cold, I'm off the bike for closer to 4 months or more in the winter. I'm an unapologetic fair-weather rider.
I just recently did my first startup since mid-November, the bike nearly 5 months sitting. For winter storage all I did was top off the tank, added a few ounces of stabilizer and pretty much left the battery alone. (I left it alone for the first two months, then bought the trickle charger and finally did connect the charger, figuring, why not? But I noticed the battery showed topped-off within minutes... so, I removed the charger and just let the bike sit with the battery's neg. term disconnected. I reconnected the neg. term but I did NOT top off the battery with the charger prior to first start. The bike started up like I'd just ridden it yesterday--no extended turnover, no lag, nada - not a single issue or problem; started up and purred like a kitten. Yes, it's only a year old, but still, the battery was perfectly fine going nearly five months idle.
I'm going to do the same next year. No charger. Just disconnect the neg. lead and reconnect at the end of the winter and see how she starts up. And I'll keep doing it until the battery finally eventually fails... how many years will that be? We'll see.
But all my reading on these fantastic lithium-ion batteries leads me to believe there are pros and cons to using trickle chargers on them. And it seems to me, there may be more cons than pros. If you're fanatical about it, and want to squeeze every last start out of these batteries, from what I've read, it involves partially discharging and storing indoors (or at a certain temp range). But I'm not fanatical. And I'm guessing that gets you maybe a few months more from the battery when all is said and done. I could be wrong and I'd love to compare my results to anyone who is doing something else: using a trickle charger every winter? Partially discharging and storing indoors?
Time will tell. Ride safe, Gary