--- product_id: 5596272 title: "Batt-O-Meter Guitar Pedal and Preamp Battery Tester" brand: "keith mcmillen instruments" price: "€ 2.27" currency: EUR in_stock: false reviews_count: 4 url: https://www.desertcart.it/products/5596272-batt-o-meter-guitar-pedal-and-preamp-battery-tester store_origin: IT region: Italy --- # Time Remaining Battery Type Check Voltage Readout Batt-O-Meter Guitar Pedal and Preamp Battery Tester **Brand:** keith mcmillen instruments **Price:** € 2.27 **Availability:** ❌ Out of Stock ## Summary > 🎸 Never Miss a Beat with Batt-O-Meter! ## Quick Answers - **What is this?** Batt-O-Meter Guitar Pedal and Preamp Battery Tester by keith mcmillen instruments - **How much does it cost?** € 2.27 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/5596272-batt-o-meter-guitar-pedal-and-preamp-battery-tester) ## Best For - keith mcmillen instruments enthusiasts ## Why This Product - Trusted keith mcmillen instruments brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **⏰ Countdown to Power:** Get precise hours left before your device runs out of juice. - β€’ **πŸ”„ Smart Battery Detection:** Easily switch between Alkaline, Rechargeable, and Carbon Zinc. - β€’ **πŸ”„ Versatile Compatibility:** Checks life for both 1.5V and 9V batteries effortlessly. - β€’ **🎀 Stress-Free Performances:** Eliminate battery anxiety before hitting the stage or studio. - β€’ **πŸ” Instant Voltage Insights:** Know exactly how many volts your battery is delivering. ## Overview The Batt-O-Meter Guitar Pedal and Preamp Battery Tester is an essential tool for musicians, providing quick and accurate readings of battery voltage, remaining life, and compatibility with various battery types. Designed to alleviate the stress of battery management during performances, it ensures you’re always stage-ready. ## Description The Batt-O-Meter from Keith McMillen Instruments is the first battery tester for musicians. Test the remaining hours of battery life and voltage of 9 volt batteries while they are still inside gear through a 1/4-inch plug. The Batt-O-Meter works with almost any active instrument pickup or effects unit (stompboxes and other floor effects) that requires a 9 volt battery to operate, and is turned on when a standard 1/4-inch cable is plugged into it. The Batt-O-Meter works by automatically placing the battery under an appropriate load to simulate real world usage. A micro-processor within the unit allows the device to intelligently determine the different loads that can be put on the battery and calculate the power in hours remaining. This eliminates the need for extra buttons and adaptors, and makes the Batt-O-Meter simple to use. The Batt-O-Meter can test stand-alone batteries: 9V, 1.5V (AAA, AA), and 3V. It works with Alkaline, Rechargable, and old school Carbon-Zinc batteries. The Batt-O-Meter requires its own 9 volt for operation, which it can self-test. Located in Berkeley, California, Keith McMillen Instruments (KMI) is an intimate company that makes innovative technology for string instruments. A portion of each KMI sale is donated to the BEAM Foundation for research and provide commissions for new musical works. ## Features - Designed to quickly save performers time and stress before relying on a battery on stage or in studio - Reads how many volts a battery is delivering - Reads hours left before the device runs out of power - Checks the remaining life in any 1.5-volt or 9-volt battery - Convenient slide switch differentiates between Alkaline, Rechargeable, and Carbon Zinc batteries - Designed to quickly save performers time and stress before relying on a battery on stage or in studio - Reads how many volts a battery is delivering - Reads hours left before the device runs out of power - Checks the remaining life in any 1.5-volt or 9-volt battery - Convenient slide switch differentiates between Alkaline, Rechargeable, and Carbon Zinc batteries. Please refer the User Manual before use. ## Product Details - **Brand:** Keith McMillen Instruments - **Power Source:** Battery Powered - **Item Weight:** 3.2 ounces - **Item dimensions L x W x H:** 4 x 2 x 4 inches - **UPC:** 837654549971 ## Images ![Batt-O-Meter Guitar Pedal and Preamp Battery Tester - Image 1](https://m.media-amazon.com/images/I/71Ku+WoIq5L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ The best investment I've made as an acoustic guitarist!!! *by D***D on September 12, 2016* 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! ### ⭐⭐⭐⭐⭐ SAVES TIME AND MONEY *by D***D on October 30, 2010* 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! ### ⭐⭐⭐⭐ Piece of mind is priceless. *by J***E on August 18, 2013* NOTE: The 1/4" plug is slightly smaller than normal 1/4" plugs, so inserting it completely may not allow for proper contact to the terminals inside the 1/4" jack you're plugging it into. Researching the design of a 1/4" jack will show that you can insert it at different levels (half-inserted) to obtain proper contact for the device to read the voltage under load. For some of my instruments, slight tilting of the 1/4" plug has been successful.This device tests your 9-volt battery installed in your acoustic instrument without requiring you to slack or remove the strings - which is EXACTLY what I was looking for. I've had a 9-volt go dead in my guitarist's instrument in the middle of set - it was horrible. Now, before I leave the house for every gig, I pop this guy into my guitar/uke and in less than 30 seconds I'll have the piece of mind that my pickup won't fail me. The clear head that this device gives me on stage allows me to concentrate on making music instead of worrying about my equipment. I don't need a device that's 100% accurate, I just need it to be 100% consistent. When the estimated remaining hours reads 100 or less, I change the battery in my instruments and recycle them down to a device on my pedalboard that has a much easier accessibility. I don't want to take the chance with anything less than 100 hours, so as long as the device is consistent in it's reading, this is my "gas tank empty warning light" to change it out.As if the above isn't already worth the price, the on-board battery tester has pulled about 6 9-volts batteries out of our recycle bag! These things still had juice but I had no way of testing and didn't want to take the change - again the price for piece of mind is priceless.Hope this review helps, love this device and will recommend it to anyone who has the need to test a 9-volt battery located in difficult-to-access locations of an instrument.Cheers! --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.it/products/5596272-batt-o-meter-guitar-pedal-and-preamp-battery-tester](https://www.desertcart.it/products/5596272-batt-o-meter-guitar-pedal-and-preamp-battery-tester) --- *Product available on Desertcart Italy* *Store origin: IT* *Last updated: 2026-05-12*