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Question about battery powering an Apogee Mini-Me Utility Plugins
Old 2nd September 2011
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Question about battery powering an Apogee Mini-Me

I'm using a DIY 12 volt Li-Ion battery pack to power an Apogee Mini-Me and an M-Audio Microtrack II. It keeps both running for about 3 hours, after which the power's down to 10 volts under load and the MiniMe just dies after another 30 minutes or so, so I try to switch batteries every 3 hours or sooner.

I use an efficient (> 85%) TI PT78ST105 DC-DC regulator for the MT2's 5 volt operation. I could also get another to do 6 VDC for the Mini-Me and I'm wondering if it's worth the bother. The Mini-Me pulls 475 mW at 12 volts but can run from 6-16v. If I use a DC-DC regulator to feed it 6 VDC, will it actually extend the battery time by a significant margin? These regulators can handle 1.5 A.

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