NOVELTY - An active material (A1) comprises transition metal containing lithium phosphate composition, where a median diameter (D90) of the active material is 10.5-60 micrometers both inclusive, the median diameter (D90) is measured by a laser diffraction method, and a half bandwidth (2 theta ) of a diffraction peak corresponding to a (020) crystal plane of the active material is 0.15-0.24 degrees both inclusive, and the half bandwidth (2 theta ) is measured by X-ray diffraction method.    USE - In secondary battery such as lithium ion secondary battery; in electrode; and in battery pack, electric vehicle, electric power storage system, electric power tool, and electronic device (claimed).    ADVANTAGE - The active material is capable of obtaining a high discharge capacity even in high load conditions.    DETAILED DESCRIPTION - An active material (A1) comprises transition metal containing lithium phosphate composition of formula LiaMnbFecM'dPO4 (I), where a median diameter (D90) of the active material is 10.5-60 micrometers both inclusive, the median diameter (D90) is measured by a laser diffraction method, and a half bandwidth (2 theta ) of a diffraction peak corresponding to a (020) crystal plane of the active material is 0.15-0.24 degrees both inclusive, and the half bandwidth (2 theta ) is measured by X-ray diffraction method.    M'=Mg, Ni, Co, Al, W, Nb, Ti, Si, Cr, Cu, or Zn;    a=0-2;    b, c and d=0-1;or    b+c+d=1.    INDEPENDENT CLAIMS are included for the following:    (1) manufacturing (M1) active material involving compressing powdery raw material to form molded product, and subsequently firing and pulverizing the molded product to form an active material having composition (I), where density of the molded product in the compressing of the powdery raw material is 0.5-2.3 mg/cm3 both inclusive, and a median diameter (D50) of the active material in the pulverizing of the molded product is 5-30 micrometers both inclusive;    (2) secondary battery (S1) comprising cathode including the active material (A1), an anode, and an electrolytic solution;    (3) electrode including the active material (A1);    (4) battery pack comprising the secondary battery (S1), control section controlling usage state of the secondary battery, and switch section switching the usage state of the secondary battery according to a direction of the control section;    (5) electric vehicle comprising the secondary battery (S1), conversion section converting electric power supplied from the secondary battery to drive power, drive section driving the electric vehicle according to the drive power, and control section controlling usage state of the secondary battery;    (6) electric power storage system comprising the secondary battery (S1), at least one electric device, and control section controlling electric power supply from the secondary battery to the electric devices;    (7) electric power tool comprising the secondary battery (S1), and movable section is supplied with electric power from the secondary battery; and    (8) electronic device comprising the secondary battery (S1), where the electronic device is supplied with electric power from the secondary battery.