
I have an acoustic guitar with an electronic pickup that is powered by a 9 volt battery, and frequently replacing these batteries became expensive. The EBL batteries with USB charging cord are the perfect solution. All four batteries can charge at the same time, if desired, using a single USB input. I install one in my guitar, and keep the other problems 3 in my guitar case accessory compartment as spares, so always have a fresh battery ready for use. When I get down to using my last spare battery, I recharge the other 3 so that I never run into power loss problems, and that's important when you are a musician relying on your instrument for performances or recording studio sessions.

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