Hi all, I work on something.. its alarm tag. I found buzzer which i want to use in simple electric circuit. Components are the buzzer, and a battery. The tag must work minimum 5 min. The problem is.. I can not find battery small and powerful enough at the same time. Battery diagonal must be 3 cm or less. Electronic characteristics- Magnetic Buzzer PB-0927PQ -Oscillation Frequency (Hz)-_______________2731 -Operating Voltage (Vp-p)-_________________4.5~ 5.5 -Rated Voltage (Vp-p)-_____________________5.0 -Current Consumption (mA/max.)-____________75 at Rated Voltage -Sound Pressure Level (db/min)-______________85 at 10cm at Rated Voltage -Coil Resistance (Ω)- _______________________25± 4 -Operating Temperature (°C)________________-20 / +70 -Storage Temperature (°C)_________________-30/ +80 -Condition by wave (°C)__________________260 ±5°C / within 5 sec -condition by hand (°C)_________________350±20°C / within 5 sec I hope someone knows the answer of my problems (battery, brand or i dont know..) please help me.