ITEM NAME:1pc 3s 12.6V 18650 Lithium Battery Charger Protection Board PCB BMS Cell 4 ZRY Descriptio n Description: In View Of A Few Electron Foundation Poorer Customer Specification: Must Not Mix Good Battery And Bad Battery To Use Together! The Closer The Capacity/Internal Resistance Of 3 Batteries, The Better! (2 Good Batteries +1 Bad Battery =3 Bad Batteries). Specifications: 3 Series 12.6v 40A Lithium Battery Protection Plate: Scope Of Application: It Is Suitable For Lithium Battery With Nominal Voltage Of 3.7v And Full Voltage Of 4.2v (Including 18650, 26650 And Polymer Lithium Battery, Without Limit Of External Size). Product Size: 41*55*3.4mm Enhanced Version Charging Voltage: 12.6v - 13.6v Continuous Discharge Current (Upper Limit) : 40A (If The Heat Dissipation Environment Is Not Good, Please Reduce The Load Current) Continuous Charging Current (Upper Limit) : 20A Scope Of Application: It Is Suitable For Electric Drill With Starting Current Below 80A And Power Below 130W. Package Included: Protection Board*1 Note: Note 1:3 15c-20c Power Batteries Are Needed To Start The Drill Successfully, Or 6 10c-15c Power Batteries (The Ordinary 18650 Cannot Start The Drill! ! !). Cars Only Note 2: Connect 0V, 4.2v, 8.4v And 12.6v In Strict Accordance With The Diagram. Do Not Intentionally Short Circuit. Note 3: When Charging The Battery, "430" Resistance Heating Is Normal, Indicating That The Equalizing Circuit Is Working; If The Resistance Of "430" Also Heats Up Without Charging, Please Check Whether It Is Connected Incorrectly. We offer you what you need! 3s 12.6V 18650 Lithium Battery Charger Protection Board PCB BMS Cell 40A Kit.Note 1:3 15c-20c Power Batteries Are Needed To Start The Drill Successfully, Or 6 10c-15c Power Batteries (The Ordinary 18650 Cannot Start The Drill! 3 Series 12.6v 40A Lithium Battery Protection Plate ).