A method and system, compatible with low-voltage CMOS technology, for controlling the charging of a battery. The wings of the fastener recess may be provided with torque pads at the outer regions of the wings adapted to engage the outer portions of the driver blades. Particles separated from one or more nearest neighbor particles by a distance greater than a threshold distance may be separated out as droplets. A variation includes a sand trap using the swirl chamber, cap, diverter chamber, and diffusing plate to separate sediment from a liquid without using a filter of moving parts. The compound 4–2,3-dimethoxy-6-methyl-5–cyclohex-2-enone of the invention is isolated and purified from the extracts of Antrodia camphorata, which can be applied for inhibiting the survival of pancreatic cancer cells and be used as a pharmaceutical composition to inhibit the pancreatic tumor growth. The residual component, after passing through the third polarization-conditioning region, has its intensity further reduced based on its polarization state.