Picked this up today. I am going to mount it on the Silvy, since it now sits for weeks at a time. http://www.grainger.com/Grainger/BATTERY-DOCTOR-Automatic-Battery-ChargerMaintainer-4NGT2?Pid=search
My truck sits for as long as 30-45 days sometimes and always starts right up... BUT... we don't have cold weather here and it stays in a nice comfy garage, which may have an effect.
I use something similar from Schumacher that puts out 1.5amps and is an automatic maintainer. I like it because it uses either alligator clips or you can bolt it to the battery. It uses quick-disconnects so you can use whichever one you want. But the one you found looks a lot nicer! Cold weather + sitting for long period = dead battery...and fast!
I've not had any issues, even after a month. I just thought it might be a good idea, and prolong the life of the battery.
What's your definition of fast? Mine can sit for 15+ days at -30*C (-22*F) and fire right up with no issues
Well then I guess the battery in my mom's car is extremely old. If I try starting it when its below 10*F after sitting for at least a week, it can't turn itself over fast enough. I let my motorcycle sit for 2 or 3 weeks (right before I put it away) and it wouldn't start. Granted the battery is the size of 5 or 6 DVD cases, I have no idea how old it is, and it was in the lower 30's (which I guess might be cold for riding a motorcycle, but I still had a fun ride). Other than that time, I've never had a hard time starting it. I do know that if we don't put a charger on our van after sitting all winter (Dec-Mar) without periodically starting it once a month, it just sits there and clicks. But that's an extreme case of sitting so I don't really count it.
