Partially solved! Some LXT batteries definitely have stand-alone low-voltage cutoff (but others don't) : r/Makita
Battery Low Voltage Disconnect Module, XH-M609 12-36V DC Battery Low Voltage Cut off with Digital DIsplay for Protection Prolong Battery Life : Amazon.co.uk: Electronics & Photo
Makita | Hackaday
Need help with Low voltage protection circuit - Badcaps
Partially solved! Some LXT batteries definitely have stand-alone low-voltage cutoff (but others don't) : r/Makita
18v Makita Battery Adapter with Low Voltage Shut-Off
006] Do Makita LXT batteries have low-voltage protection? - YouTube
Making a Over Discharge Protection for Makita Batteries : 3 Steps (with Pictures) - Instructables
18v Makita Battery Adapter with Low Voltage Shut-Off
Makita USA - Product Details -GEC01PL
Making a Over Discharge Protection for Makita Batteries : 3 Steps (with Pictures) - Instructables
Making a Over Discharge Protection for Makita Batteries : 3 Steps (with Pictures) - Instructables
12V 24V Battery Low Voltage Cut Off Protection Board Charger Controller Module | eBay
Low Voltage and Over charge cut off protection for every Li-Ion battery using cheapy BMS for 1$ - YouTube
Makita and Rayovac Battery Pack Teardowns
Anyone here used an 18v makita battery on their cordless Dyson? : r/Makita
Battery Automatic Low voltage Cut off Charger Over Protection Controller Module | eBay
12V 24V Battery Low Voltage Cut Off Protection Board Charger Controller Module | eBay