Introducing the perfect 1s voltage checker! This ultra tiny voltage meter fits anywhere and accepts both types of the most popular plugs being used on micro FPV quads (aka Tiny Whoops). Voltage is quickly displayed on the LCD and can really help out when trying to get batteries of the same voltage ready for parallel charging. Buy a handful and keep them close by at all times!
Note: DO NOT plug more than one battery into the checker at the same time.