![Keith McMillen Instruments: Batt-O-Meter battery tester | Tape Op Magazine | Longform candid interviews with music producers and audio engineers covering mixing, mastering, recording and music production. Keith McMillen Instruments: Batt-O-Meter battery tester | Tape Op Magazine | Longform candid interviews with music producers and audio engineers covering mixing, mastering, recording and music production.](https://tapeop.com/_m/issues/77/77_art.jpg)
Keith McMillen Instruments: Batt-O-Meter battery tester | Tape Op Magazine | Longform candid interviews with music producers and audio engineers covering mixing, mastering, recording and music production.
KMI Introduces Batt-O-Meter, The First Battery Tester for Musicians Batt-O- Meter Prevents Onstage Disasters and Saves Time, Money & the Environment | Keith McMillen Instruments
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