Active metal and active metal intercalation electrode structures and battery cells having ionically conductive protective architecture including an active metal conductive impervious layer separated from the electrode by a porous separator impregnated with a non-aqueous electrolyte. The power tool has a power tool housing with a first subassembly and a second subassembly that is connected with the first subassembly. The bitmap of device dependent color values is used to generate a forward model that maps device dependent color values to color values in a device independent color space using a nonlinear regression analysis that minimizes a color difference metric between the reference color values and the set of device dependent color values mapped through the forward model. The VMM may attempt to schedule the vCPUs that have not accepted the interrupt, for example. The poppet valve also has a second position in which the needle control chamber is closed to the fuel inlet but open to the needle control vent.