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[OM] Re: opinions: external battery power for the E-1 FL-50 flash

Subject: [OM] Re: opinions: external battery power for the E-1 FL-50 flash
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxx>
Date: Tue, 26 Jul 2005 22:02:00 -0400
Well, I'll stick with the SP Systems pack.  I can get three of them for 
the price of a Quantum.  Should I kill the battery (something I've yet 
to do) I can replace it for $20.

Chuck Norcutt

Mark Dapoz wrote:

> I don't think you can compare capacities based on watt hours.  The SP pack
> may deliver more power because of the higher voltage, but it may also die
> sooner.  What's actually more important with lead acid cells is their
> ability to recover from a deep discharge (eg. forgetting to shut off the
> pack!).  Deep discharging a lead acid battery is the worst thing you can
> do to it.  Any MIL spec battery is required to recover (after charging) to
> something like 25% of the rated capacity after being shorted for 30 days.
> Sonnehshein's are MIL spec and won't leave your Quantum dead if you happen
> to leave it on for an extended period of time.


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