https://alexnld.com/product/ddtc07md-1a-type-c-usb-5v-to-4-2v-li-ion-lithium-battery-charger-module-for-3-7v-18650-cell-phone-battery/?hilite="USB 4 Slots Rechargable Battery Charger For 1-4 3.7V Li-ion 18650 16650 14650"