Cheap lights using CR123 batteries
Well,
Are there any? I need some backup lights, and it'd be nice to use the same batteries as my main light. Cheers, tom -- We are going to have to be speculative, but there is good and bad speculation, and this is not an unparalleled activity in science. [...] Those scientists who have no taste for this sort of speculative enterprise will just have to stay in the trenches and do without it, while the rest of us risk embarrassing mistakes and have a lot of fun. -- Daniel Dennett |
Cheap lights using CR123 batteries
On Sun, 16 Jan 2011 12:42:06 +0000
Tom Anderson wrote: Well, Are there any? I need some backup lights, and it'd be nice to use the same batteries as my main light. If you don't find something specifically designed for CR123 at a sensible price, I'd have thought anything that uses 2 AA cells and has a voltage regulator would do, with minor modification. |
Cheap lights using CR123 batteries
On Sun, 16 Jan 2011, Rob Morley wrote:
On Sun, 16 Jan 2011 12:42:06 +0000 Tom Anderson wrote: Are there any? I need some backup lights, and it'd be nice to use the same batteries as my main light. If you don't find something specifically designed for CR123 at a sensible price, I'd have thought anything that uses 2 AA cells and has a voltage regulator would do, with minor modification. I might be capable of the requisite modification if the light had firmware, but if it's hardware, it's very likely to be beyond me! 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). Anything which can take two AAs can probably run on one CR123 and some stuffing. Hmm. The biggest challenge might be finding a rear light which runs on AA rather than AAA. tom -- Gotta have skills to pay those bills. |
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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