An infusion pump assembly is disclosed. The battery charger includes at least one pocket having a bottom and sidewalls. Each memory cell includes a magnetic tunnel junction and a non-magnetic tunnel junction that are connected in series. Next the minimum pixel number of each level value of Density units Dn-1 and Dn are counted. This construction enables a reduction in leakage current via the walls of the shallow groove isolation of the strained substrate, thereby improving the element isolation properties. The direction of the discharge of the propelling water jet is changed by mechanical sensors, electrical sensors, or by interrupting the water pump.