[PLUG] experiments - OT: FiOS auxiliary power for BBU

[Keith Lofstrom]

On Thu, Feb 18, 2010 at 07:56:48PM -0600, Fred James wrote:
> ... there is (again, on my model) a button marked "Battery 
> Emergency Use" (next to the Alarm Silence button), which (although 
> Verizon fails to mention it in their documentation) is intended for 
> emergency use as follows ...
>     "Press the button once to use the reserve battery capacity and/or 
> the auxiliary battery capacity after low battery shutdown.  The unit 
> will emit a confirmation beep."

The procedure did not work with the battery totally unplugged.  Perhaps
it works with a low - but not 0V - battery.  I will see if I can
arrange one.  

...
> Thanks for the input - that sounds (correct me if I am wrong) as if one 
> were to connect the free ends (say with alligator clips attached?) of a 
> cable of the description you gave above to a fully charged 12 V 7.2 AHr 
> battery (i.e., the same type as the one in the unit itself), and the 
> barrel end of that cable  to the BBU auxiliary port provided, one could 
> be good to go?  First making sure polarity on the cable was correct, of 
> course.

That might be worth a try.  Perhaps the unit actually senses a 
battery (rather than a power supply ) out there.  A small gel cell
battery has a different impedance and capacitance than a power
supply, or a car battery, for that matter.

Does the auxiliary device have a separate charger, or is it charged
by the main unit?

Keith

-- 
Keith Lofstrom          keithl at keithl.com         Voice (503)-520-1993
KLIC --- Keith Lofstrom Integrated Circuits --- "Your Ideas in Silicon"
Design Contracting in Bipolar and CMOS - Analog, Digital, and Scan ICs