Hey Tom,
You absolutely need to care for your battery in the winter, but pretty simple stuff. As I mentioned, do not store it in cold temps. In general, most LiIon batteries are recommended to be stored at 70% or so. You should top off the battery every month (some say 3…but I think once a month is best). You can defer to the manufactures manuals for specific brands suggested battery care. We have a page on our site where all the manuals are at easy access…feel free to check it out.
As for a dealer in Portland, I have heard of a few. Rich at Cynergy Cycles in a good guy and very honest. He & his wife moved out to Portland (from the midwest) and opened up shop there last year. I would recommend you check him out:
http://www.cynergyebikes.com/default.aspx Always a good idea to buy from a reputable local when you can. Although we sell online it is mostly because the coverage of bike dealers (and good ones) across the US is still very thin….sometimes online is the only option. I think Rich will take good care of you. I met him when working on the manufacturing end of ebikes and he seemed like a good guy. Let me know how it goes. Also, some shops offer a weatherproofing service (expect to pay $50-100). I am not sure if Rich does but if you think you need it you can ask. I just checked and the lines he carries are Currie, easy Motion and EG. Not sure you price point but I deal with all 3 companies and they all back their products well. EG is the value (cheapest) among them. Last I spoke to Rich he was thinking of adding a brand or two. Solex was one….french company with a small line but the look and sound pretty decent…VERY popular in Europe. I am looking at adding that brand as well.
Hope that helps!
Julia
Chicagoland Electric Bikes