
4S 20A 18650 LITHIUM BATTERY PROTECTION BOARD
The BP420 4S 20A 18650 Lithium Battery Protection Board safeguards four-cell lithium-ion packs with overcharge, over-discharge, and overcurrent protection. Supporting up to 15A continuous and 20A peak current, it ensures safe, stable, and efficient operation for high-power devices, DIY battery packs, and energy systems.
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