Anyone have a recommendation on a type or brand of charger/tender to buy?
I just use a generic car trickle charger 12V unit. Works well, and does not send too much power all at once. I use it before the start of the season.
Battery Tenders are a personal preference. Some people swear by battery tenders while others say that they cause premature battery wear. If you do get one, use the Battery Tender brand. They are the most widely used.
http://www.walmart.com/ip/Schumacher-XM1-5-Maintainer-1.5-Amp/15140193?findingMethod=rr#rr
Just got this one. Mostly because it wasn't expensive and seems to have the features I want, and got decent reviews.
I got the battery tender junior. Bike started up this spring with one try.