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> Chargers & Accessories > Accessories
> Batteries & Accessories > Battery Voltage Indicators

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HobbyKing™ Lipoly Low Voltage Alarm (2s~4s)

HobbyKing™ Lipoly Low Voltage Alarm (2s~4s)

Simple to use Lipoly low voltage alarm that is small and light for on board use, plug's 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~4s                              
Size: 38x25x11mm  
Weight: 7g
Voltage Accuracy: 0.03v
Low Voltage Alarm Threshold: 3.3v (per cell)



PRODUCT ID: DL-Volt-Alarm

Shipped from:
International Warehouse

Price

$2.34

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 Customer rated
5476
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Total of 132 discussions.
Matthew  1 points - 9/27/2016
 
Hi there, noob question. Can you have this alarm connected to the Lipo all the time? Or best to disconnect it when not in use? I have RC4WD 1/18, always a pain taking the body off, so want to leave it connected when possible. Thanks
 handyjap 832 points
When left connected permanently it will drain the first cell of the battery so it will be a connect-to-use situation. According to "Tarald" further down the discussions if you disconnect the black wire the unit stops functioning.
BEST ANSWER CREDIT AWARDED
 Matthew 1 points
Thanks Mate, appreciate the info
 handyjap 832 points
Welcome
Look4one  137 points - 6/30/2016
 
This low voltage monitor is virtually useless. The alarm should sound at 3.6 volts, not 3.3 volts per cell. Most speed controllers execute a low voltage cut-off at 3.2 per cell. So you get an alarm at the SAME time as the ESC cut-off. Not useful. Use the HobbyKing™* Lipo Voltage Checker (2S~8S) which is cheaper and adjustable.
 EstebanT 1015 points
I get your point, but you do not want your ESC to cut-off when flying a multirotor!
BEST ANSWER CREDIT AWARDED
 Look4one 137 points
That is a big risk with no LVCO on a Li-Po powered device. There IS a fire risk when you drive them below 2.75 volts. The last time I checked, fire on an aircraft is considered to be worse than a power loss. This is a mute point, because drone flyers generally have better grade of gear. Like me, you probably monitor the primary power voltage with a radio bidirectional communication system like FASSTest.
 handyjap 832 points
Then rather use "HobbyKing™* Lipo Voltage Checker (2S~8S)" PRODUCT ID: 206000020-0 as you can adjust the alarm voltage to your liking and it has the same 2 device sounder..
 EstebanT 1015 points
At present I monitor the battery with FrSky FLVSS LiPo Voltage Sensor and a Taranis radio. Before that, I used this Low Voltage Alarm. Of course telemetry is better, but this is a very low cost but effective option.
Juan  6 points - 5/26/2016
 
This lipo alarm is so noisy! I love it!!. ..I wonder whether there is any buzzer/locator with the same dBs than this lipo alarm.
Paul  3 points - 4/2/2016
 
I have bought 2s 3000mah 40c batteries and am using this alarm with them. I have tried with fully charged batteries and as soon as I accelerate hard the alarm goes off. Should I be worried is there an error?
 handyjap 832 points
IT IS NOT GOOD FOR THE BATTERY. There is no error other than excessive current draw. It sounds like you need a battery with a higher C rating or higher capacity, quite a bit higher and with that came the magic much much higher price tag. While the alarm sounds the battery voltage at the terminals is lower than 3.3v. In some very exclusive instances the internal voltage of the battery can still be above 3.3v (which already is very low) like when the battery is fresh, the current is not excessive (not too much like a short circuit) or the connections between the cells to the terminals have high resistance (too thin or, bad conductors). The problem is that usually the conductors are sufficient for the current- and C rating and that the load impedance is just too low/current draw is just excessive for the battery.
 Paul 3 points
Thank you for the reply. I had also found many other threads that say this is normal for the alarm to sound when the car is accelerating and under load but they just carry on because the battery itself is not actually lower than 3.3v. I'm hoping therefore that it is still safe to use these batteries. The battery I have bought from hobbyking and they're brand new two Turnigy 3000mah 40C and I'm using them in the Axial Yeti XL which is a big and powerful car but I'm surprised the battery isn't enough for it. If I do need higher capacity batteries then I have a problem because the battery compartments aren't actually big enough to fit trigger ones in.
 Banj0 38 points
40C constant or burst? I'm surprised that your Yeti is drawing enough to drop the voltage that much, though I'm unsure of the specs. The ESC that comes with the RTR version of that truck is capable of 100A...your battery should be capable of 120A at the 40C rating, and really the Yeti should not draw that much on 2S, since it's rated to 3S. Check that your drive train is nice and free...nothing running to tight. An electric motor will let heaps of current through when it's stalled or overloaded. It will also let a lot through when going from reverse to flat out forward (my son likes to do this with his Stampede, and it often sets off the alarm). Ultimately, you can try a different battery, maybe at 60C, or perhaps just a differently branded battery. I agree with handijap, if your battery is subjected to excessive drain like that too frequently, it will shorten the life. Better to go higher capacity or higher C (or both) if there's no other reason for the draw.
Pierre  2 points - 1/26/2016
 
Is there a way to change the low voltage threshold?
 EstebanT 1015 points
No, there is not. Leds come red at 3.6V/cell and alarm buzzer sounds at 3.3V/cell. If you are looking for an adjustable alarm, then you can consider PRODUCT ID: HK-CM-06, can be installed on your model and works very well. Regards!
Customer Reviews
Overall Rating
Dietmar
35 likes
Value
Quality
1 thumbs up!
4 Stück gekauft, wurden vom Zoll beschlagnahmt weil das CE-Zeichen fehlt. HobbyKing leistet keinen Ersatz und fühlt sich nicht zuständig.


11 comments. Reply..

Overall Rating
Markus B.
25 likes
Value
Quality
Like it?
I love this smal alarm system. Easy to fit and very safe. After connetion, it check every cell of your Lipo and the horn will be activated for a second. It is very loud and a nice working tool for more saftey.


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Overall Rating
rappa
190 likes
Value
Quality
Like it?
very godd poduct!!!!


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Overall Rating
beyaz
59 likes
Value
Quality
Like it?
model arac kullananlar icin gerekli bir ürün


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Overall Rating
__LCZ
53 likes
Value
Quality
Like it?
What a very good idea for plane.


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