What is the minimum supply voltage level to raise alarm to user?

Hi,

Am developing a Battery operated Device, I need to Develop a low voltage indicator to user.

My battery voltage is 7.4v 3500 mAh. What is the minimum level UNO operate Stable.??

PLZ HELP ME.

sabarinathann:
What is the minimum level UNO operate Stable.??

Did you read the product page?

If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may become unstable.