ERHIndia 5V Boost Step Up Power Module Lithium Battery Charging Protection Board LED Indicator USB for DIY Charger 134N3P (2pcs) Power Supply Electronic Hobby Kit
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Board Size: 22 * 17 * 10mm/0.87 * 0.67 * 0.39inch(L * W * H) Input Voltage: 3.7V-5.5V Charging Current: Z 1A Output Current: Z is 1A Output Voltage: 5V BAT Discharge Termination Voltage: 2.9V Preset 4.2V Charge Voltage with ±1% accuracy Discharge Efficiency: 85% (input 3.7V, output 5V/1A)