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HobbyKing™Lipoly Low Voltage Alarm (2s~3s) (US Warehouse)

HobbyKing™Lipoly Low Voltage Alarm (2s~3s)  (US Warehouse)

Simple to use Lipoly low voltage alarm that is small and light for on board use. This plugs into the balance lead for detecting low voltage on individual cells.

A loud alarm will sound and the 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)



PRODUCT ID: 067000002


Weight: 15g
Quantity: 
USA West Warehouse
stock
0
International Warehouse In Stock View Item
Price  HKD16.82

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 Customer rated
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Total of 5 discussions.
newbee 550mm  142 points - 5/14/2014
 
Hobby King staff,,,,you have no voltage meter/warning buzzers at the US warehouse,,,,please restock. Thanks
Joseph  2 points - 2/1/2014
 
How do you use it for 2s batteries where the balance plug only has 3 pins?
 Blowfish 17 points
You just plug in the balance plug off of the battery. Make note of the common (often black) wire. If it is a 2S battery, you will plug in the balance plug using the common and 2 adjacent pins. Any other pins are not used. They do not need to be connected.
Randahl  6 points - 8/25/2013
 
Nobody have an answer for plmcc01 or Dan?
 Russell 8 points
I guess i should have specified the 2 i have left do not have the c4 cap and work well.
plmcc01  5 points - 7/9/2013
 
I just checked my unit out today and discovered that my unit does not have a capacitor at C4 or at C1, also. However, my unit does seem to be working just fine. My "test rig" for determining this consists of a Turnigy nano-tech 3S 45-90C 1300mAh battery as my test battery. I have discharged it using a Hyperion EOS 720i Charging Station to the following values: Cell 1 = 3.318V, Cell 2 = 3.338V and Cell 3 = 3.431. I'm using a Hyperion EOS Sentry Battery Tester to determine these values. And, whenever I plug in my unit to this particular battery, I get a blast of sound and flashing red LEDs. Hope this helps.
Dan  17 points - 7/5/2013
 
If somebody has one of these that works (mine doesn't work until the voltage is way too low), could you look at the component side and tell me if you have a C4 capacitor on yours? Holding the board with the pins to the right, it should be on the left of the IC and to the right of the black transistor marked T2. It would be below the resistor marked R7. I'm also missing C1, lower left corner, but that doesn't concern me as much.
 mmmoishi 2 points
Just got one of these today. Looking at the bottom on this board, there is no component at C4 where the pads are. I don't have C1 either. Dunno if this is intended or not.
 Dan 17 points
The pads for C1 are not tinned, but the pads for C4 seem to be tinned. However, go ahead and test yours out and if it works then I'll know something else is up with mine.
 Russell 8 points
I got 3 all work just fine, well accept the one i lost when i threw the battery out of the plane in a roll, but that happens. I use them with 3s batteries.
Customer Reviews
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Overall Rating
Smoke05222022
13 likes
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Work great on 3s no more guessing or setting of timers can't beat the price.....


1 comment. Reply..

Overall Rating
Dan
15 likes
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Not too happy. I have just finished a new Hexacopter, with a KK2 flight controller (on it's way to a Arducopter0. Although the KK2 board has a V input, I hadn't bothered to hook it up. I used this instead. I put this on a 2200 mAH 3S1P c65-130 battery, and put that battery on the Hex. I had programmed the ESC's to NiMH, low voltage, soft cutoff. So this was supposed to give me lots of warning before that happened. Nope. I noticed the Hex starting to get a little squirrelly in the air, so I brought her in. Two of the ESCs cutout just a few feet above landing, but I managed a gentle crash. This thing was still showing green all three lights. My battery tester showed 0pcnt remaining !!! Not good. If anything this should have alerted LONG before the ESCs cut out. So, this is pretty useless for protecting my Hex. I'll see how it does with fixed wings 2S1P, but I don't have a lot of hope. It was only $2 and change... however, right now, it's a wasted $2 and change. Perhaps I can retro-engineer the circuit, figure out the reference voltage source for the comparator, and replace a resistor. Sounds un-fun.


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Overall Rating
plmcc01
3 likes
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I just checked my unit out today and discovered that my unit does not have a capacitor at C4 or at C1. However, my unit does seem to be working just fine. My "test rig" for determining this consists of a Turnigy nano-tech 3S 45-90C 1300mAh battery as my test battery. I have discharged it using a Hyperion EOS 720i Charging Station to the following values: Cell 1 = 3.318V, Cell 2 = 3.338V and Cell 3 = 3.431. I'm using a Hyperion EOS Sentry Battery Tester to determine these values. And, whenever I plug in my unit to this particular battery, I get a blast of sound and flashing red LEDs. I also like the compact size and minimal weight as well. I'm planning on installing it into a Quadcopter that I plan to build. This is a very handy item!


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Overall Rating
xanadrew
50 likes
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Bought a few of these. They work, but they're really really quiet. I have to bring it in really close to hear, and even then it's hard to make out over just the air rushing over the wings. I have a few of the slightly larger one too (DL-Volt-Alarm) and they work much better.


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marlan05
8 likes
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I bought a few of these for my quad builds to ensure I dont come crashing down from the sky with lipo cutoff. They work great and do the job! I can hear them loud and clear when I reach voltage cutoff.


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