3S BMS 20A 18650 Lithium Battery Charger

Protect your 3-cell 18650 lithium-ion battery pack with this 3S BMS 20A Charger Module, designed to monitor voltage and current across three series-connected cells and cut off power in unsafe conditions. It’s an essential safety component for any high-current lithium-ion build.

Suited for DIY projects where current draw doesn’t exceed 20A, such as Arduino and Raspberry Pi-based builds, 3D printers, quadcopters, and robotics applications, this board is compatible with 18650 cells rated at 3.6V or 3.7V nominal voltage. Its comprehensive protection features help prevent dangerous battery conditions before they occur.

• Short-circuit protection – Guards against wiring faults
• Overcharge protection – Prevents damage from excess charging
• Over-discharge protection – Protects cells from deep discharge
• Overcurrent protection – Cuts off at unsafe current levels
• Overcharge voltage 4.2V – Standard lithium-ion safety threshold
• Maximum working current 20A – Suited for high-current builds
• Ideal for robotics & 3D printers – Reliable for demanding DIY projects

Keep your 3-cell battery pack safe with this 3S BMS 20A Charger Module – comprehensive protection for high-current projects.