2pack of RC Lipo Battery Voltage Checker Monitor Low Voltage Alarm Buzzer Alarm

I ordered these for my race quad and I must say I am very impressed. They are extremely loud when they had the user settable voltage settings. There is a small button between the 2 black round sound emitting devices that you push to rotate through the various voltage low settings to make this little bugger scream out that it's time to land. I have used other similar products but the quality and price of these tell me they will be my Go To from now on. I would recommend these to anyone who does not want to ruin there expensive lipo batteries by running them to low. Would/Will Buy Again!

Work like a charm set them just below storage voltage (3.7v or so) and when alarm sounds, battery is safe to put away, alarms' loud enough to be heard from a distance. Seem to accurately display cell voltages atleast compared to my charger, well worth the price!!

Works perfect for my 3S Lipo batteries. I used my balance charger's battery meter to separately verify the voltage, and they were either right on or off by 0.1 volts (possibly due to slight discharge between checking with the balance charger and checking with the Floureon voltmeter). Setting the low voltage alarm is really easy; just depress the button between the small speakers and the LED screen will indicate the changed minimum voltage (or off if you don't want to be audibly notified). I do wish there was a way to disable the beep when initially powering on the unit. I have it switched on/off via a momentary switch, and it beeps every time I check the voltage. Other than this minor nuance, it works great!

Purchased several of these and they work fabulous in fact I just ordered 2 more 2 min ago! Only issue I've had is on a descent crash they tend to get thrown off quadcopters battery balancing connector! It's nothing that I could not resolve if I just took a little time to figure out a more secure way than just using Velcro on back. The alarm is loud enough to hear from a fairly far distance while the copter is flying! Also excellent for checking batteries charge while in the field! I highly suggest this for multiple reasons ie;can be used to help find quad when lost(if it doesn't come off)along with previously stated reasons!

Great little gadget to help you monitor your battery pack voltages on any 2s lipo battery or larger. They do work with 1s batteries as well but can't be used to monitor their voltages. I use these while discharging my 2s lipo packs down to for storage mode as my charger can only do 5 watts max. I use a automotive light bulb setup to help discharge my 2s and 3s lipos when I don't get a chance to use them the day I charged them. You can also mount these to a quad copter/drone to help let you know when you need to land and to prevent damage to your lipo batteries. I'm only giving these 4 stars as one out the two I received didn't work but the seller was quick to ship me a replacement and I'm completely happy to this point. I'm a little worried as one of the first two I received only worked for a few times then decided to go into an ERR 8 then ERR 3 error code. I will chalk this up as a defective unit as the other two have performed flawlessly to this point. Accuracy of these little units is right on par with my Fluke volt meter with no discrepancy between my volt meter and these. I would recommend these to anyone needing piece of mind while flying and for monitoring your batteries while doing a discharge on them. I will update this review if I have anymore problems with these and as always if you found my review helpful please click yes below and any and all comments are welcome.

Must have for RC lipo battery user. 2 pack came in handy attached one to the heli while the other was ready for field use. I painted the positive side red so it can easily be identified during field use. Sometimes it hard to see the small numbers in the bright sun so that helped a lot. Very loud pizo definitely gets your attention on the larger heli when the voltage reaches critical. Did not check the drain current used by the inline system but it didn't appear to reduce flight time by much.

A must for anyone who does RC and uses lipo. Great quality, easy to use! Inexpensive so I probably have like six of these, one in my truck, one at work, one at my cottage, etc. Great little tester to check liposuction for balance and total voltage.easy to use, no switches to turn it on, just plug it in to the very left side of the tester into your lipo balance plug and beep beep beep and a display of each cell and a total.

These monitors work very well. Can set the threshold voltage for when you want the alarm to signal low battery. Have mine set for 3.5V per cell. Gives me a little safety measure to get plane down before hitting LVC. Very loud. Can be heard from far away. Use then on all my batteries 7.4, 11.1. 14.8. Service from this seller was great. Quick to ship.