Batt-O-Meter Guitar Pedal and Preamp Battery Tester

This product is excellent! Save's time from pulling batterys and replacing them just to make sure your battery doesn't give out while performing. Not to mention the money you save on getting full use of the battery life. Totaly easy to use, stick the plug in push the button you have the voltage and it calculates time left in accordance with the drain that the unit (in my case acoustic electric) is putting on it. Awesome product! It will pay for itself in getting the most out of your batterys, plus the peace of mind that your battery light is not going to start flashing in the middle of a set, I don't know how much time I have left when that happens and I never will!

I am an acoustic guitar player, and my primary venue is with my church worship team on Sunday's and for other various church services. Allow me to briefly describe the headache that I encounter with batteries for my 2004 Yamaha FGX-04 acoustic electric guitar...When I arrive on a typical Sunday for our pre-service practice, I typically throw in a fresh 9V battery into my guitar. Setting my volume knob to 75% on the guitar, I let my BBE pre-amp and DI to take care of the rest. On a given Sunday, my battery will be in the guitar for about 5 hours, and a single fresh Duracell ProCell is typically more than enough to get me by. However, when I show up for mid-week practice, I have no way to know if that battery is still good enough to get me through the setlist. Is it good enough to get me by until Sunday? Who knows, and I would hate for a battery to die mid-way through service. So the inevitable solution is to pop a fresh battery in every time I bring my guitar to church. I don't know if you've checked recently but 9V batteries aren't cheap, nor am I made of money. I needed a better solution than buying tons and tons of batteries and not knowing if I was throwing away batteries that can still have some use to them.I purchased this meter as opposed to purchasing rechargeable 9V batteries. Why? Because rechargeable 9V batteries are still incredibly unreliable and I cannot risk the chance of a battery discharging too rapidly to last through the service. Standard alkaline cells are still the industry standard for electric acoustics, nothing beats tried and true chemistry.Now, back to my dilemma. Once purchasing this meter, I determined that the lowest voltage I can safely supply to my guitar without risking premature loss of signal, is about 7V. Low and behold, I started testing batteries after every service, and I'm finding more and more that I can get more life out of them. On occasion, I get a battery that lasts less than expected, but that's the beauty of this meter: if I use such a battery, before I jump back onto the platform to jam with the band, I can be check and be confident that my battery is still good!Not to mention this meter can check several different chemistry types of batteries, and several different styles thanks to the hyprid 1/4" jack. I have used this feature just a little, but rather prefer popping the battery out of the guitar and touching it to the contacts on the meter. I also have yet to try this handy little device with any battery-powered pedals since my rig is completely powered. The only thing eating up 9V batteries is my guitar.I am so thankful for this little device! It provides me with alot more confidence in my instrument and my sound, and just for that reason, it was worth the money. Nothing beats the relief knowing that your equipment is functioning fine, you have a good battery, and you've practiced.Best of luck and God bless!

This is a great tool for those of us with active guitars/basses that have the inconvenient screw-on battery door. You can check your battery power without disassembling your axe. I currently use this with my Ibanez bass. Unfortunately, it does not work with all of my pedals. I am fine with that, and the seller is clear that there are certain pedal wirings that this does not work well with.Word of caution - the tester probe is NOT A 1/4” Plug. It is somewhat smaller in diameter, so do not just expect to plug this in and go. For some guitars/pedals It requires you to hold this in place to make the necessary contact... sometimes tilted slightly to the side, other times plugged 70-90% (but not all the way) in. It’s more of a “probe” than a “plug”, and the description does not make that clear.This little issue, and the random pedal incompatibility are the only reasons I did not give this the 5th star. Great tool, but not perfect.If you have the correct expectation, you will see the value in this tool. I definitely recommend.

Very happy with this tester. You do need to know beforehand whether the battery - deep in the bowels of your guitar - you're testing is an alkaline or a carbon-zinc. The tester can only read the voltage, so it says, if this is an alkaline battery, you've got X hours of life left; if it's carbon, you have Y hours left.It's reassuring to know that you're going to a gig and you still have, say, 75 hours of playing time left!

Had great hopes for the Batt-O_meter but it doesn't work in either of my units. Got it to avoid removing the battery in my Martin guitar to test it. Have a standard Martin acoustic guitar with factory installed under saddle pick-up with a 9 volt battery. Also doesn't work with my Fishman Aura pedal. It does say in the literature that it may not work in all products. But these are pretty main stream items and you would like to think it would work. Contacted their technical support and they told me I need to remove the battery from the guitar in order to test it. I told them it is a real hassle to remove the battery from inside that body and if I go to all that trouble, I'm just going to change the battery. That's kind of the whole point of the Batt-O-Meter. Now I'm stuck.

This little thing is incredible, once I downloaded the PDF manual from the website and learned how it works it became a very valuable tool

I was hoping that this would plug into my Martin guitar end-pin jack and tell me how much battery life was left so I wouldn't have to take the strings off every time I wanted to check the battery before a show. This thing won't register as even being plugged into my guitar, nor will it register as being plugged into my fishman aura. It did work well on my boss pedals but that's not what I needed it for. Now I still have to take the strings down and pull out the battery on my guitar to check it. I'll keep it because the little outside battery checker seems to work pretty well and that's better than nothing. Very disappointing as I thought this would really make my life easier. I'm not saying it is a bad product. I'm just saying that it didn't do what I was hoping it would do.

Gives you a ballpark reading on batteries but I tested it against my multimeter and got a different reading. I trust the multimeter more. The readings also seem to fluctuate if you check the same battery again in succession. Also doesn't seem to work with active guitars (Electric/acoustic/basses) which is kind of why I wanted it as a touring guitar tech. You still have to remove the battery from the guitar to check it. However I have still been using it as its great for checking pedals bit I wouldn’t trust the reading it gives too much.

The packaging of the Batt-O-Meter appeared to have been previously open and then partially stapled shut when I received it ... not sure if the product was used or not but it was definitely not packaged as if it was new. The Batt-O-Meter only seems to work on a few of my devices - on the rest if just gives a 'plug error' code. I would have problems recommending this product or vendor to anyone.

It does what it's supposed to very well, quite tricky to test lone batteries though but it still works. It's very useful with the built-in jack plug though and I'm glad that I bought it.