Mark,
The key here, I think, is that batteries vary wildly. Not all reasons for
the ban are the same, either.
Many years ago, when NiCd's were first appearing on the market, some
electronic photoflash units carried the same ban. It SEEMS to have been
due to limited inrush-current capability of the DC/DC converter capacitors.
That is no little matter; I have seen even a 50 volt cap can explode when a
sufficiently low-impedance 5 volt source is connected to it.
It's _possible_, I suppose, that since rechargeable batteries are a
somewhat lower voltage source, that the safety and EMI certifications of a
product may not include operation at that lower voltage.
More likely, operation from lower-voltage sources triggers a battery shut
off or causes unsatisfactory operation after a shorter period of time than
is acceptable. That's MY guess, anyway. Some devices provide for this with
a battery holder using nine cells for NiCd's, and 8 for alkaline or
carbon-zinc.
Cortland
=======================================================
Mark Hone wrote:
Is it functionality, safety or EMC that worries the instruction book
writers?
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