How to Make a Battery Protection Circuit (over-discharge protection) - YouTube
Arduino based Battery Over Discharge Protection Circuit | Homemade Circuit Projects
Universal 12v Battery Protection Board With Delay Anti-over-discharge Controller Low Voltage With Led Indicator Light - Integrated Circuits - AliExpress
Battery under voltage protection circuit | Electronics Forums | Electronics basics, Circuit, Electronic engineering
batteries - How to fix oscillation of an 'over-discharge protection' circuit for a lead-acid battery - Electrical Engineering Stack Exchange
12 V Battery Charger with overcharge and deep-discharge protecting