Thanks for that Neezy, but how do you rig up the battery in a waterproof container? Water bottle? Small rectangular frame bag? That was the only question I really had with the batter pack mentioned. In your post it says that it has a wire coming out of your waterproof pannier, doesn't that render it non-waterproof?

And also - the charger, it is based on temperature? How good is that?

The other problem is that site is ass when it comes to international shipping (read: to Canada), they use UPS which comes with ridiculous brokerage costs. I don't understand why they can't use another carrier like USPS?