A Cycling & bikes forum. CycleBanter.com

Go Back   Home » CycleBanter.com forum » Regional Cycling » UK
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Cheap lights using CR123 batteries



 
 
Thread Tools Display Modes
  #1  
Old January 16th 11, 12:42 PM posted to uk.rec.cycling
Tom Anderson
external usenet poster
 
Posts: 746
Default 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
Ads
  #2  
Old January 16th 11, 06:58 PM posted to uk.rec.cycling
Rob Morley
external usenet poster
 
Posts: 7,091
Default 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.

  #3  
Old January 18th 11, 12:44 AM posted to uk.rec.cycling
Tom Anderson
external usenet poster
 
Posts: 746
Default 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.
  #4  
Old January 18th 11, 02:33 AM posted to uk.rec.cycling
Rob Morley
external usenet poster
 
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.

 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Rechargable Cells/batteries for Lights Keiron Kinninmont Techniques 8 December 25th 06 11:58 PM
Lights without batteries? Steve Watkin UK 9 May 16th 06 10:04 PM
Cheap 6v 4aH SLA Batteries HughMann Australia 10 May 15th 06 04:20 AM
Cheap rechargable batteries Mark Thompson UK 54 January 30th 06 01:44 PM
Rechargeable batteries with LED lights David Ward Techniques 8 March 17th 05 03:40 AM


All times are GMT +1. The time now is 05:30 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright 2004-2018 CycleBanter.com.
The comments are property of their posters.