Esp32 Esp32s for Wemos for Raspberry Pi 18650 Battery Charge Shield Board V3 Micro USB Port Type-a USB 0.5A - China 18650, 18650 Battery Charge Shield Board | Made-in-China.com
LAPG 18650 Single Replacement Battery
Amazon.com: 18650 Battery Holder Case 4-Channel Micro USB Interface Battery Box with Connecting Line for Raspberry Pi 0.5A 5-8V : Electronics