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Battery powering a Phil Jones Double Four

hm, I've got questions about this setup:
1. it doesn't cut off like PowerAdd at high volume?
2. how many Ah battery to get for a couple of hours? (I believe, Dewalt makes from 2 to 12 Ah, but larger are more expensive.)

thanks.

1. No, it doesn't cut off. At least not at the volumes I've played along with a couple electric guitars. A drill can pull a lot of current.
2. That's the 4Ah pack in the photo. The packs have 3 LED lights to show remaining capacity. After a 2+ hour rehearsal last week, all 3 lights still light up. I also have 1.3Ah packs. They work fine too, but I haven't tried them for as long yet. Next rehearsal I'll use the 1.3Ah pack and see how long it goes.
 
I like to toss it on a desk or a table...I'm just lazy and don't want to deal with outlets, plus the plug seems like it won't last tons of abuse. I really want a 2nd one for a stereo pair. I've been using this and a briefcase to monitor some testing of a poly effects beebo / digit (stereo effect w crazy imagine) and having a pair of these to toss anywhere around the house would be amazing!!!
 
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1. No, it doesn't cut off. At least not at the volumes I've played along with a couple electric guitars. A drill can pull a lot of current.
2. That's the 4Ah pack in the photo. The packs have 3 LED lights to show remaining capacity. After a 2+ hour rehearsal last week, all 3 lights still light up. I also have 1.3Ah packs. They work fine too, but I haven't tried them for as long yet. Next rehearsal I'll use the 1.3Ah pack and see how long it goes.

Report: the Dewalt 1.3Ah (25Wh) pack lasted the entire 2 hours of rehearsal with room to spare. So if you have a battery that can handle the peak current needs, it doesn't have to be huge.
 
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Just got the poweradd pilot pro2. It's charging now. Seems like the "C" adapter would be the right fit and although the directions read oddly, I think I press the one button until it indicates that I've got 12volts output then plug it in and off we go. Can't wait to get it fired up!!!

Nevermind the goofy questions...it all came together once the charge finished. 20 volts...use the long cable...boom, and just like that, I'm portable!!!
 
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