I have an existing system using a 2200uF 16V aluminum electrolytic as
energy storage, to keep a 3.3V processor running long enough to log
some data after the AC input has been removed.

I am constrained by space and cost, but cost is moveable
within reason, if I can justify the delta.  We don't have established
environmental specs, which complicates things significantly.

So, I am wondering what practical alternatives are available.


Production volume?

Allowable cost range ? (Stipulate fuzzy constraints as necessary where
information is lacking)

How often must / might it be "activated"?

Storage time?

I'm wondering if any sort of electromechanical store might work?

Vague as necessary limits on allowable cost and frequency of use are liable
to be useful as there may be an acceptably low cost battery solution
depending on these constraints. .
What is the minimum holdup voltage that you can tolerate?



         Russell

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