Unprotected, button top. Sold individually. These are a very high capacity & high current capable cell! All cells are now the newest version that can be used in series! (button-top positive connection).
These are a larger diameter than most 26650 cells! PLEASE CHECK MAXIMUM BATTERY DIAMETER OF YOUR DEVICE BEFORE PURCHASING!
Read HKJ's review of the cell here.
Manufacturer Cell Specifications:
These cells, like all lithium and IMR cells, should not be discharged below 2.5 volts.