18V Li-ion Battery Protect Circuit Module Board For Makita DrillSpecifications:Voltage: 18VSize: Approx. 4.5x3.3cm \/ 1.77x1.3"Lithium battery control circuit boardProtection chip for electric tools batteryCompatible with: For MakitaIts main function to battery are: over charge protection、 over discharge protection、 short circuit protection、 over current protection、 reverse charge protection、 over heat protectionPackage includes:1 x Module