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The ARRL has a book called Emergency Power for Radio Communications.

What does the community think?

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Given the popularity of Field Day and the continuous discussion about batteries on SOTA and QRP lists, I think it is on-topic.

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I'd be inclined to say that if they clearly have a radio connotation (e.g. "what kind of battery pack(s) do I need to run my XYZ rig for at least a day"), they're fine.

More general power questions (e.g. "how many watts can I expect to get out of XYZ solar panel in cloudy conditions") are probably off-topic.

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Batteries are an integral part of any portable station, so radio related battery questions have a place.

But the question needs to be focussed: IMHO Battery capacity vs. weight for portable transceivers is not a good question and will lead to opinion-based answers as there is no definitive one.

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    $\begingroup$ Are you sure that there is no definitive one? Battery technologies are measureable and can be compared without opinion. $\endgroup$ – jkj Oct 23 '13 at 18:11
  • $\begingroup$ It's not answerable without taking into account cost and availability (both of battery and charging equipment). It's also little mor ethan a disguised "What is the best..." question $\endgroup$ – Andrew M0YMA Oct 23 '13 at 20:41

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