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Best Battery for Active basses

Publix (house brand) 9v, in the 2-pack. I wait and catch them on a BOGO sale, half-price.

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I can't hear any tone difference, last as long as any thing else (I long ago taught myself to change them every 4th of July and Christmas). Occasionally, though, they smell like rotisserie chicken, but that's fine with me.
 
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About 16yrs ago I took a studio recording class taught by a rather eccentric audio engineer. He swore by Eveready Cat 9 Heavy Duty batteries for active basses. Of course, he also used ESP power cables, if I recall. He was knowledgeable on many things audio, but very eccentric.

Personally, I use whatever my wife happens to buy. We had a bunch of bad Costco batteries, but we dropped our membership and haven't lost anything due to battery leakage since.
 
I guess somebody needs to check with the Project Farm guy on YouTube & see if he's compared 9v batts….

GREAT suggestion.

FWIW, I hadn't seen a battery leak for decades, since I was maybe 7 years old in the early 70's, and that was a plain old carbon cell. Over the last 10 years, the only brand I've never had leak are Eneloop rechargables, but I don't think they make 9v. Most rechargable 9v sized batteries I've seen are more like 8.3v fully charged.
 
This is what I use in every active bass I have. When I get a new bass with active electronics, I will pull whatever battery is in there and put one of these in.

Duracell Procell
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I also use these. But have you ever had issues with the 9V, or other sizes, going bad ( leak ) before they were used in less then 2 years? I have, and just interested in your experience. They are not bargain-basement-priced, that's for sure.
 
This is what I use in every active bass I have. When I get a new bass with active electronics, I will pull whatever battery is in there and put one of these in.

Duracell Procell
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My old church used to hand out procells as needed.

I wonder whether the "constant" or "intense" model is the right one to use now that they've changed up their lines.
 
Guys - there are only a few companies in the world that actually manufacture batteries. There is a huge amount of white labeling. Walmart, Amazon, Kirkwood etc, don't make anything - they just buy white label

East Penn makes Duracell, Procell, DEKA, AC-Delco (some of it), Exide, Interstate, and a few others
Energizer Holdings makes EVEREADY, Rayovac, VARTA and probably a few white label brands.
All of these brands sub out manufacturering to each other on various sku's

Manufacturer is just not that important.

Except when it comes to things like QC tolerances and materials used.
 
I just know that Thomman batteries do not work in my EBMM Special. They do not make good contact as they are a bit smaller dimensions.
When I put them for the first time I thought the preamp had died, because the contact kept breaking. Finally I realized that it was the battery. Since then, I use Duracell again and exclusively.

This post is not sponsored by Duraccel :).
 
The only battery that ever leaked (in a pedal) for me was a Duracell... Must have been a one off thing because I have never had any problems before. I do like the Panasonic 9 volts cause they are good and cheap at the Dollar Store!