4Pcs XH-M609 DC Low Voltage Disconnect Module, 12-36V Battery Cut Off Protector, Over Discharge Protection Board with LED Digital Display for Lead-acid Lithium Batteries

【Effective Over-Discharge Protection】Includes 4pcs blue XH-M609 low voltage disconnect modules. Designed for 12-36V lithium and lead-acid batteries, it automatically disconnects the output when the voltage drops to your preset value. This prevents deep discharge and significantly prolongs battery life. Note: Output voltage always equals the current battery voltage via relay output. 【Easy Setup & One-Key Reset】Features an intuitive LED display with "+" and "-" buttons. Short press to view current values, double-click to set parameters (decimal flashes), and long press for rapid adjustment (auto-saves in 3 seconds). Need a fresh start? Hold both buttons while powering on to perform a factory reset (defaults to 12V protection and 2V hysteresis). 【Smart Configuration & Charging Guide】For new batteries, simply set the standard discharge termination voltage. For aging batteries, we highly recommend measuring the actual termination voltage before setting parameters for optimal accuracy. To maintain battery health, we suggest slow charging (Charging Voltage ≈ Rated Voltage x 1.2; Charging Current ≈ Rated Current x 0.2). 【Versatile Applications】This 12-36V DC voltage protection board is highly versatile. It is ideal for electric 2-wheel/3-wheel vehicle batteries, automobile and new energy EV discharge protection, solar and wind power storage systems, and various DIY off-grid setups requiring reliable battery over-discharge protection. 【Crucial Safety Instructions】Strict adherence to safety protocols is required. ALWAYS power off the circuit before wiring or installation—never operate while live. Do not charge batteries unattended or indoors. Use instruments to confirm parameter matching before use. If working with voltages above 36V, wear insulated gloves and shoes. Wear protective goggles during soldering.