The invention provides a stable positive-electrode mixture slurry that is not subject to gelation, a positive electrode with abundant flexibility, and a lithium secondary battery with excellent battery characteristics. The air handler includes a blower associated with a first plug-in connector that is selectively connectable to a second plug-in connector of a heater and a third plug-in connector of an electric air cleaner. The resulting insect resistant calcium borate infused foam material is non-toxic to humans and resistant to leaching out of the protective calcium borate compound from the foam material under high moisture conditions. The pushing means is circumferentially positioned at the mould base.