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This 1S 12A BMS protection board is designed for 3.2V singlecell LiFePO4 lithium iron phosphate batteries. It provides comprehensive safety protection including overcharge, overdischarge, shortcircuit and overcurrent cutoff, effectively safeguarding 18650 LiFePO4 cells during charging and discharging. Compact and reliable, this 5pack is widely used in DIY battery assemblies, small power supplies, LED lighting and portable electronic equipment.