A jaw crusher having one or more improved elliptical jaw members is disclosed. A battery is positioned and charged by energizing the charger, putting the battery at a battery zone, adjusting the charger buttons, pressing down the pushing button to further press the battery tightly and then releasing the pushing button. The master DLL receives the slave output signal and compensates variations in delays of the data and clock signals to generate a capture clock signal. At least one trolley is attached to a top of each second door section.