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Powering
Place a fresh 9V alkaline battery into the DT454 battery tray, using the correct
orientation.
Flip the PWR switch to ON. The PWR indicator LED will illuminate.
When the battery starts to get so low, that you should change it, then the LOW
BATT indicator LED will illuminate. This indicator is calibrated for alkaline type
batteries.
Note, it is possible for a battery to be so dead, that it doesn’t have enough juice to
power the LOW BATT indicator circuitry or LED, but it can still illuminate the PWR
LED. With such a nearly completely dead battery, the unit will not operate (even
though the LED indicators may lead you to believe that it should).
Alkaline Battery Life
Battery life varies, and depends on numerous factors. Use of phantom power
takes up battery resources, especially at 48V. See the “Phantom Power” section
for tips on optimizing power efficiency. Here are some estimates for typical
continuous usage from a fresh 9V alkaline battery:
No Phantom: ~7hrs
With one 2mA mic @ 12V: ~5hrs
With one 2mA mic @ 48V: ~2hrs
Rechargeable Batteries
The iPowerUS 9V Lithium-Polymer is a good choice for a rechargeable battery:
http://www.ipowerus.com/Products/DC9V500/DC9V500.htm
These are nice because of their high capacity, and fast recharge time. The higher
capacity also extends battery life. Here is an estimate for typical continuous
usage from a fresh battery of this type:
With one 2mA mic @ 48V: ~5hrs
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