NGS PowerPump 6600mAh Power Bank 2x USB Output (1x5V/1A & 1x5V/2A) - Lemon
NANO HUB - Multi Voltage Adapter - FXLION
Lemon battery - Wikipedia
Joel Avrunin's Effective Bits of Knowledge: Batteries from Lemons - A Homeschool Electricity Lesson
PDF) Construction and evaluation of electrical properties of a lemon battery
Lemon Battery - Science World
Buy Renogy 72000mAh 266Wh 12v Power Bank with 60W PD, CPAP Battery for Camping, High Capacity Large Camping Power Bank with USB-C DC Wireless Charging & Flashlight, CPAP Battery Backup Power Supply