12V Anti-over-discharge Board Low-voltage / under voltage protection alarm board

Description

Mainly used for battery (9V or 12V) voltage monitoring, simple and practical, all with sound and light alarm prompts. The battery under-voltage buzzer issued a "drop drop drop" sound, while the red LED lights up when the battery voltage has risen to a set value above, the buzzer to stop the alarm.

9V battery: when the battery is over-discharged (battery voltage below about 8V), the red indicator lights up and the buzzer calls, to achieve the sound and light alarm, so as to achieve mastery of the battery discharge state, to prevent the battery from over-discharging and damaging the battery.

12V battery: when the battery is over-discharged (battery voltage is lower than 10.4V or so), the red indicator lights up and the buzzer calls to realize the sound and light alarm, so as to grasp the battery discharge status and prevent the battery from over-discharging and damaging the battery.