Simple to use Lipoly low voltage alarm that is small and light for on board use, plugs into balance lead for detecting low voltage on individual cells. A loud alarm will sound and LED will change from Green to Red if any individual cell drops to 3.3v or below.
Spec. Lipoly Range: 2s~3s Size: 38x20x10mm Weight: 5g Voltage Accuracy: 0.03v Low Voltage Alarm Threshold: 3.3v (per cell)
hi guys i have a problem i charged my turnigy 3s 2200 lipo and connected the alarm it showed green lights i then flew a few minutes and it showed red lights and the alarm started beeping i then tested the battery and it shows 10v still??
When operating your car/plane/copter there is an amp draw which brings down the voltage and triggers the alarm. The alarm is serious when your car is sitting idle. When your plane is cruising. Or when copter is sitting level.
I'm having trouble with my alarm. It beep continuously when the throttle is wide open. Then the alarm goes off at low throttle about 5 minutes into flight and acts like the batteries are low. So I brought the plane in 3 different times (3 different 3s batteries) and checked the batteries for voltage and I had between 11.24v-11.54v. So i'm not to sure whats going on? Any thoughts would be much appreciated!
It checks each cell and beeps when any one drops below 3.3V. Cells show a lower voltage when they are under load, which is why this is such a handy device. You get real time feedback.
If all three batteries are showing the same behavior then I can only think of three possible issues.
First, The alarm is bad.
Second, The batteries are all roughly the same age with approximately the same levels degradation.
Third, Your setup is drawing more power than you thought it was.
I have a few of these alarms. When they beep at full throttle it tells me that it's time to land soon. I try to get on the ground before the alarm is beeping at low throttle since I don't want to over drain the batteries. I have one old tired battery that sets off the alarm during take-off... even after a full charge. It's the only battery that does this.
I might have 3 tired old batteries. But when I land I have green lights and each cell is with in .02 volts of each other, no where near the 3.3v. And it does start right at takeoff beeping. The setup is one of flitetest swappable's so I figured it should work. I've got some new batteries on the way so I will try them. Does battery voltage drop when you go full throttle and then go back up? I'm very new at this so I know next to nothing! Thanks for the help!
Yes, the lowest readings from the battery happen under the greatest load... and the voltage readings will go back up when you remove the load. You never want a cell to go below 3.0V (3.3V is actually lower than I'd prefer). That's why I like these alarms... they tell me what's happening in the air, not on the bench. Assuming the alarm is working correctly, I'll bet you'll see much different results from a new battery. Hearing that your batteries drop so much voltage under heavy load tells me they may be older... or that they have been sitting at full charge for some extended periods. (Ideally you charge them and use them, otherwise put them back down to storage a mode of 3.8V-3.9V per cell). My 'bad' battery was accidentally left fully charged for too long and now it's not as useful as it's twin.
Technically, you want to have them fully charged for the minimum time possible. Practically I'll charge as many batteries as I have/need. If don't use them that day, I always move them back down to storage mode. Some chargers have a storage mode feature. If your charger doesn't do this, I highly recommend finding one that does. The Accucel-6 (Product Id ACC6) is a great example of a popular low cost option.. Otherwise, just put the full battery into your plane and run it down to storage range (3.8-3.9 per cell). Easiest scenario is to just charge and fly and put them away til next time... they'll be lower than the standard storage range (depending on how hard you flew them).. but this is better than fully charged.
NOTE: You'll get slightly different answers from whoever you ask, so it's worth doing some research on lipos. There are lots of good sites out there.
Very loud ear piercing sound that is easily heard, however i have not tested it out yet in a quad or similar but im quite sure you would hear it if not to far away and possible even at some smaller distance.
Just when the battery pack is connected it beeps for about a 1 seconds so be prepared for that and green lights come on that show which batteries are connected. If a battery voltage goes down to under about 3.3V it starts to beep at an interval off 0.5 sec on and 0.5 sec off (i would like it to be on constant but oh well, might be able to change some components to do so) and the same led that correspond to that battery blinks red at the same interval and the green corresponding led turns off completely at this point.
When the voltage goes up on that battery to over about 3.3V the beep stop and the green led goes on and the red stop to the next time it goes under again.
Nothing really to complane about exept this interval thing. I would absolutely recommend it but i havent flown with it yet though to see if it could be heard with motors on but im quite sure you would even at a little smaller distance.
I bought two of these. This is a great product. I tried with the alarm is loud and sounds very good from a distance at least 50 meters. Now I am calm about my batteries and know when to stop. I changed the old NiCd batteries on my drill and put lithium polymer 3s now works perfectly and alarm tells when to stop. I strongly recommend taze alarm.
brillant item very simple device an very affective,you can hear the alarm when doing fly bys clearly
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I use this simple and inexpensive item on my own Multi-rotor craft. The LEDs are a great visual indication of battery voltage and the loud Piezo buzzer lets me know when its time to land with a safe amount of voltage in the pack - Ben