It looks like a Hailong battery case to me. You will have to look at your pack to see if it is a 4 pin or 5 pin version. The above alibaba link is for importers. Look at ebay or aliexpress for a single unit. I think it might be hard to find a 4 pin version. Unit Pack Power, one of the large China vendors says they moved away from 4 pins.
You can always ask the vendor to quote a price on a 4 pin pack, and also ask for brand name Samfung or LG cells. The latter will raise the price.