I use it to check all my 1s cells before parallel charging. It's super easy to use and that help me make sure to always check every battery, even when I'm 99% sure they're all storage charged. Sometimes one is not, and oh boy am I glad I used this checker!
Bought this so my son can learn to test batteries before use. Great tool for checking small batteries.
Use it every day to establish my best batteries , when and how to charge them and so on. Should be in every NewBee drone toolbox.
Way better than using the multimeter