... and ... and places and applicable in usual days and ... and ... products,and various rechargeable,battery-powered, and transformer ... -type products-such as note books, video cameras, portable CD-ROM drives, Walkmans, PDA , cellphones,cameras,and ... flash-lights. 3.The digital design of the power supply has functions of preventing over-charge and ... over-disch-arge,and ... long,and the ...