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Old January 18th 11, 02:33 AM posted to uk.rec.cycling
Rob Morley
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Posts: 7,091
Default Cheap lights using CR123 batteries

On Tue, 18 Jan 2011 00:44:38 +0000
Tom Anderson wrote:

But very good point; for those playing along at home, CR123s are the
same diameter as AAs, a bit shorter, and twice the voltage (if
they're the rechargeable kind rather than disposables - strictly
speaking, CR123A, i think).


3V is rather more than twice the 1.25V you'll get from a typical
rechargeable AA, hence my suggestion of a voltage regulator (which I
think you'll find in all but the cheapest LED lights anyway, but I
could be mistaken).

The biggest challenge might be finding a rear light which runs on AA
rather than AAA.


No shortage of cheap ones on eBay. Or you could just run a cable from
the front light.

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