This question needs to be addressed during the winter: What's the lowest cost, most efficient means of thermally protecting the batteries of an E-Zip from ambient temperatures (1). I'll be looking into this question further, but I post it here in case someone else has an ingenious solution which doesn't include replacing battery chemistry. I'm looking forward to my own E-zip, but not riding it in 0F weather on icy roads. Except for the SLA batteries, the E-Zip is low cost which is a good reason to use it during winters.

(1) Estimate 30 minute exposure to outdoor temperatures. The battery packs can easily be removed from the bike and carried inside a warmer building.