This is a single, 1.2 volt Ni-Cad battery like those used in most glow plug ignitors like those made by Hot Shot, Sullivan, and other manufacturers.  It is a direct replacement for the cells used in those ignitors, and can be charged with the OEM charger that came with the ignitor, or with any charger that recognizes a 1S Ni-Cad/Ni-MH battery.  We remove the tabs for you so it can be inserted into the ignitor's housing just like the original battery.
 
Specs:  1.2 volt (1.4 volt nominal) 2200mAh Ni-Cad.  Paper wrapped.