I have been searching for these for years, this brand, Aokoda seems to be the only one left doing this. I got these in June of 2022 for$3.99, hopefully, they keep making them this way. I will be ordering more. This should be added to the description "These will stop beeping when voltage recovers above alarm setting"

These have the alarm that shuts off if the cell(s) recover above the alarm voltage! Other copycats that Amazon and even some other normally reputable RC shops sell stay on until the button is pushed or the battery is disconnected once the voltage drops below the set point even if it recovers. That means if you throttle up for takeoff or vertical climb and the voltage temporarily drops below setpoint, the alarm will be on the entire flight. Worthless if using the alarm instead of timer. NewBeeDrone is the only place I have been able to find the authentic AOKoda alarm. I just tested two that I received today, and they work properly, so I’m ordering five more!

Using to monitor my lipo plugged in to my heated lipo bag in the winter to warn off excessive drain on that battery when the bag is closed. I do wish that the negative pin was marked for less fires work when plugging it in.

This thing is small but it packs a big punch! Don’t let it’s size fool you. With it you can check the capacity of Lipo/Li-ion/LiMn/Li-Fe batteries for 1S to 8S.

You can set a low voltage alarm and if you plug it to the battery that’s on your quad it’s so loud that you will hear the low battery beep from a very long distance.

I know I can get them dirty cheap online but I like supporting NewBeeDrone. The battery Checker works just fine