I have 3 quick questions about Minn Kota's onboard chargers.

1. I found the one that I am looking for on Amazon $50 cheaper than any of the regular retailers. Does it matter who the retailer is as far as the warrenty goes?

2. Will the Minn Kota extentions void any warrenty?

3. I am going to need to mount the charger so that it is vertical. Can this cause any problems?

Thanks.