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This TP4056 charging protection board combines lithium battery charging and safety protection in one module. It adopts 5V Micro USB power input with 1A steady charging current, perfectly matching 3.7V lithium and polymer batteries. Built-in multiple safety protections effectively avoid overcharging, over-discharging and short circuit risks. Lightweight and small in size, its easy to embed into various portable devices, smart gadgets and electronic DIY projects for reliable battery charging management.