Circuit for Buzzer on battery low voltage and gsm module to have sms on mobile

[Mani]

I need a circuit which is actually a battery tester and produce alarm/buzzer on battery low voltage and also give an sms alert on mobile that your battery is dieing...Can anyone help me

 

[vinod chandran]

Hi try this
http://www.eleccircuit.com/simple-led-display-warn-battery-low/