Thanks for the link, txtumbleweed. I got the black 1300 and the stainless 650 from ecigsejuice.com. I was very happy with the customer service, but I could have saved some money if I had seen the Cropduster post before I ordered.
This weekend I removed the paint from the black 1300, and I'm very happy with the results. I used the reamer from my swiss army knife and scraped the paint off dry. There is a bit of streaking, but overall it looks very good, and I like the feel of the stainless. I had a chrome SI Volt battery for a while, but I didn't like how it felt at all, so I'm happy about the stainless finish. I prefer the weight and balance of the 650, but it's nice to have the 1300 if I'm away from a charger for a long time.
Functionality-wise,
batteries are great, but I'm not crazy about the 5-second cutoff. 7 or 8 seconds would be much better. I heard that there were some Echos that did not have the cutoff, but I haven't been able to find them. The batteries work great with my SI Volt cartomizers. I had to modify a couple of my SI Volt chargers; they have a small plastic lip that limits their use to 9mm-diameter batteries like the SI Volt. However, I was able to cut off the lip with my (you may see a theme here) swiss army knife, and now they work fine with the Echo batteries.
If anyone has a line on a big auto KR808 battery with a longer cutoff, I'd appreciate it.