1. That thing is pretty good but the only downside is the voltage can't be adjust when it can't read properly because due to nature of black screen, it won't read or display inaccurate when the temperature drop especially Canada. Nothing be more accurate than 100 $ Multimeter. The wort thing ever me that I'm using is Low voltage buzzer. That thing is pretty useless unless you are getting a good. I heard many good review from Wolfpack low voltage buzzer. Last gaming at Action Commando, I almost blow up my face because of that low voltage buzzer.

2. In our PM, I also give you a link of Cell Balance Diagnostic. They are pretty good. Display all voltage and it could be adjustable when it can't read property. You just simply use Multimeter check the voltage and adjust according to it.

3. The balancer is really required to all Lipo battery again, unless you plan to burn your garage then I have no more suggestion.
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Whats the difference between the voltage checked as posted by Ex, and the cell balance diagnostic? Dont they both just show you what the voltage is and whether its below 3v/cell ?

I'm a bit speechless now. You don't see the different.

Go on www.hobbyking.com they have both of those little gadget. Research a bit, do your homework by reading the review on both. Hope it help

im just looking for something that beeps loudly and accurately as I use my gun since the battery would be hiddne in the stock tube. Once i hear the noise, I can use my voltmeter at home to measure the exact voltage and charge the lipo if necessary

This is quite the wealth of info....I will certainly be referring back to this in the future. Thanks guys, and Turok for bringing it up.

1- You will never find a NiMh battery that will be able to run your gun AND fit in your buffer tube (even with the stock fully out).

2- The LiPo that KND has is perfect for your setup.

3- You don't need any gadget or stuff that will let you know. You gun cannot and will not cycle properly at 6V. Even at 7V it will be hard. I can tell you that you will feel that your gun is dead. From ok to no-go, you have 2-3 BBs. You will feel it. The thing you must not do is to wait 2-3 seconds and squeeze an other two rounds. That overdrains the pack.

Your point #3 is referring to lipos correct? So are you saying I dont need any type of alarm or voltage display since i can "feel" when the voltage is close to 6V? Hmm.. I didnt know that even at 7V your gun will be sluggish.

Yes, for LiPos.

A full 7.2v pack will be somewhat slow, but manageable.

An empty pack dropping voltage does not have any power and you will feel it instantly. The problem occurs if you really want to fire an other burst because you got the best possible line of sight.

Ask youself if that kill is worth your gun, your house and maybe part of your body (depending on when the failure occurs).

Ive been doing some reading and research about leaving a resting voltage in your lipos. People have recommended leaving around 3.8V inside the battery when not in use. If you leave the battery unused for a long time (ie. 3 months), will the voltage gradually drop, and you will se the lipo pack inflate?