Int 15 Fn 6000  U - Hp 100lx/200lx - Get Main Battery Level                [p]

   AX = 6000h

Return: AX = battery level

Note:  multiply the returned value with 1Bh and add 622h to get millivolts

See Also: AX=6001h,AX=6002h,AX=6003h,AX=6004h