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What is the best 9v battery for active basses?

EverReady is the best 9v for metal, just look at the logo specific to the 9v!


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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.
 
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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.

Yes, this is at least semi-serious. No 18v batteries, I realize.

This was a serious question, if anybody knows the answer:

A Smith pre-amp can run as an 18v preamp with one 9v battery. Are there any others that can do that?

There are a fair number of 18v preamps that will also run as 9V preamps; but specifically, I am wondering if there are other pre-amps besides the Smith that will actually run at 18v on a 9 volt battery (per Ken Smith theirs do but will run out of juice twice as fast with only 1 9V battery.)