Once the battery discharge phase is detected in the battery (equal or less than 3v supplied) I put the circuit in very low consumption and flash a led to let know the user the battery needs to be replaced.

If a subsequent low battery level is detected, say 2.8V for example, the circuit does not operate at all via BOD or by putting it to sleep.

I just want to let know the user that the rechargeable battery needs to be recharged or replaced


thanks!