DNA 200 is designed for battery packs that are permanently installed into the device, or battery packs that install using an insulated, polarized connector rated for at least 25 amps. If the battery pack is installed with the polarity reversed, the fuse will blow to protect the battery pack, board and user.
If you are manufacturing a device that is designed to be used with three individual replaceable 18650 cells, an accessory board is available from Evolv to adapt from three individual cells to a pack and tap connector pinout, as well as provide cell-by-cell protection against incorrectly installed or reversed cells.