General description 4Pcs BL1830 Li-Ion Battery PCB Charging Protection Circuit Board designed for Makita 18V batteries (1.5Ah, 3Ah, 6Ah, 9Ah) including models BL1815, BL1845, and BL1860. This product features a built-in dual IC that detects cell voltage and provides essential battery protection. Technical specifications Protection features: overheat protection, overvoltage protection, undervoltage protection, overcurrent protection, overcharge protection PCB size may vary due to supply chain and processing technology changes Measurement allowed error: +/- 1-3 cm Color: blue Material: PCB Compatibility and accessories Compatible with Makita 18V batteries: 1.5Ah, 3Ah, 6Ah, 9Ah Models: BL1815, BL1845, BL1860 Usage Best suited for use with torque wrenches, impact drills, and angle grinders Other information Package Contents: 4 x Lithium Battery PCB Board Note: Light shooting and different displays may cause the color of the item in the picture to differ slightly from the actual product