Features 1、STRONG UNIVERSALITY: 12V 30A battery overdischarge prevention protection board, simple and practical, with sound and light alarm prompts, can be suitable for all loads 2、NO CURRENT BATTERY: The maximum allowable 30A current board, for most 12V batteries 30A means that the battery has no current (capacity) during the process of the relay contacting the load 3、SIMPLE OPERATION: This overdischarge prevention controller adopts LM358 main chip, with sound and light alarm, no direct protection, easy to use 4、POWER CONSUMPTION: Static self consumption is about 12 mA (battery voltage is normal), dynamic self consumption is about 100 mA (battery undervoltage) 5、BASIC SPECIFICATIONS: The board size is 7 x 5cm, the diameter of the fixing hole is 3mm, the distance of the fixing hole is 4.3cm Specification Item Type: Battery Against Excessive Discharge Controller Main Chip: LM358 Material: ABS Power Consumption: Static: Self consumption is about 12mA (Battery voltage is normal) Dynamic: Self consumption is about 100mA (When the battery is under voltage) The overdischarge prevention controller 30A means that the battery has no current (capacity) when the relay contacts the load. Board Size: Approx. 7 x 5cm / 2.76 x 1.97in Fixed Hole Diameter: Approx. 3mm / 0.12in Fixed Hole Distance: Approx. 4.3cm / 6.4in Package List 1 x Battery Against Excessive Discharge Controller