Intellect Lipo Battery Power Level Tester & Alarm to Indicate Low Power

"Its tiny, fitts in the buffer tube of my m4 with a 1450 mah 7.4.. Beeps when voltage is at 3 v per cell perfect for what i need

"Weird that I have met a lot of people over here in the USA during my time here, who own Lipo running AEG's and yet do not own this little piece of circuitry. I would really suggest anyone to get hold of something like this, as it helps to keep your lipo's in good condition.
Only thing I would say is, don't expect it to fit into smaller AEG's quit as well as the larger ones. Mine fits into the front of my MP5k handguard with a little jiggle,

"Awesome little tool to keep your lipo from turning into a brick.

One review said his beeps from time to time wile he is shooting the tester does that whenever your gun pulls more power from the battery than it should be if this happens alot wile in full auto it can be a sign that something might be wrong inside your gun that is causing the motor to have to pull more juice to turn the internals.

On the other hand if it happens in semi it is normally because of the randomness in trigger pull like pulling the trigger in the middle of the gears slowing for some reason can cause the power to flux and set off the tester.

I personally love this feature since I can stop useing my gun before I brake it further.

Also a small strip of tap over the speaker makes it just loud enough to hear with your head next to the gun if you dont want to give away your location but it has been my expereince that outdoors with a mask on you can hardly hear someone walking 10 feet away let alone pinpoint where a small beep came from.