Brian Gaff wrote:
Has the manufacturer never heard of a series diode?

Some stuff has one connected so that it's normally reverse biased, and
shorts out a battery connected the wrong way. The fuse is optional, but
costs more.

Of course provided the design could cope with a 1.2 volt voltage drop, one
could fit a bridge and then it would not matter which way around it was.

That would mean that you would either need an extra cell, or would have
a much reduced useful life from the ones you put in.


--
Tciao for Now!

John.