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What is the best 9v battery for active basses?

I used an el cheapo at church one time (that's all anybody had) I put them in my status s-2. Realizing it wasn't my batteries (turned out to be an amp issue)- I was going to remove them and they were wedged in very tight, they were stuck! Had a very hard time removing them, and put a big scratch on my bass in the process. Upon inspecting the cheapo batteries, they were slightly larger than my usual Duracells, lesson learned! Never use a cheapo battery esp in pop up battery holders!
 
I am assuming (probably wrongly) this is at least semi-serious. I use Duracells. But.. be aware they make one that is called Duracell Procell and it's fairly inexpensive. Make for things like theater wireless mics they deliver a good 9v for about two hours and then die a quick and unannouced death. They are cheaper for a use one time. Theater folks use them for one show and toss 'em out.
Not good for instruments or pedals.

Duracell has repeatedly said that there is no difference in the Procells and the copper top Duracells. The Procells are packaged differently for quantity pricing and ease of storing for transport by touring groups and other traveling users. They are good for 5 hours of continuous use in a wireless microphone transmitter such as the Shure UH-R handhelds.

They are as suitable for instruments and pedals as the copper top Duracells.

When I'm not using my rechargeable AA batteries, I use the Duracell Quantums (with the silly little strength meter on the side that's semi-useful). They seem to be an improvement over the copper tops. I use the 9V version in my active basses. They will last for months, but I get paranoid after a couple of months and change them anyway.
 
Problem solved.

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