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IoT with ESP8266: 18650 Li-Ion battery powered Wemos D1 with Wemos Battery Shield - DONE 48 days achieved
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Amazon.com: Onyehn 4pcs for Wemos D1 Mini Battery Shield Micro USB Single Lithium Battery Charging Boost Module with Pins LED Indicator 5V 1A DC : Electronics
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Battery Shield For WeMos D1 Mini Single Lithium Battery Charging & Boost With Green/Red Light Indicator | Walmart Canada
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