Wemos Li-ion Battery Shield for D1 Mini - WMD1MBATSHIELD
Battery shield - Wemos D1 Mini - www.adrirobot.it
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
Nettigo: Battery shield for Wemos D1 mini [Yā nǔ shén]