Anyone know if there is any chance of it working.
The capacity checker is designed to measure each cell independently, that's why you have an interface with 7 leads.
Note that the manual says metering of 2-7 cells -
not 1 cell.
Since your battery doesn't have individual outputs from each built-in cell, you can't get multiple readings unless you pry it open.
Maybe there's a way to get an aggregate reading from just one output, but you'd still need to buy/build a custom connector with power cable from your battery.
Here's a similar device, I guess it's the same technology underneath, but they come with more connectors:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=250691359795http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270634333087Caution: Li-ion batteries can blow up if shorted. If you're building a custom cable, make sure you know what you're doing!
Drop a PM to the seller and ask. Judge for yourself if he sounds knowledgeable, or just trying to sell you smth he has no clue about...