Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Electronics, Lighting, & Gadgets HRM, GPS, MP3, HID. Whether it's got an acronym or not, here's where you'll find discussions on all sorts of tools, toys and gadgets.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 03-23-09, 07:59 AM   #1
no motor?
Senior Member
Thread Starter
 
no motor?'s Avatar
 
Join Date: Dec 2005
Location: Chicagoland
Bikes: Specialized Hardrock
Posts: 4,954
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
What can I do about my lights dimming in the cold?

My Fenix LD2 and Cateye EL 530 both have dimmed on my during my regular ride home the last 2 times I've used them, and it hasn't been that cold here either. Temperatures were in the upper 40's last night, and in the mid 30's the time before that. I'm using freshly recharged batteries in the Cateye, and used both nonrechargable and rechargeable batteries in the Fenix. Both times the lights noticeably dimmed when outside, but worked much better after they warmed up when inside. I don't remember this happening before, is there something I can do to prevent this?

Last edited by no motor?; 03-23-09 at 10:50 AM.
no motor? is offline   Reply With Quote
Old 03-23-09, 11:27 AM   #2
bicycleflyer
747 Freight Pilot
 
bicycleflyer's Avatar
 
Join Date: Aug 2008
Location: Ohio, USA
Bikes: Rivendell, Bike-Friday Pocket-Rocket and one home made fixed gear
Posts: 458
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Well the non rechargeable batteries are most likely alkaline. Those perform miserably in cold temps, even in the 40s their performance drops off. So stop using those. As for the rechargeable batteries I am not sure. Are they NiMh, or NiCad? There are a whole lot of variables that affect their performance. Most can be traced to a poor charger. Other things we would have to know more about so we can help you would be their age, capacity, brand, and what type of charger you are using.
bicycleflyer is offline   Reply With Quote
Old 03-23-09, 11:55 AM   #3
AEO
Senior Member
 
AEO's Avatar
 
Join Date: Jun 2007
Location: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
Posts: 12,258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
LEDs perform better in the cold, batteries, however perform better at warmer temperatures.

not even NiMH, NiCad, Li-I or lead-acid batteries function too well in colder temps.

I suppose you can give the entire thing a wrapping of insulation, but it can overheat and burnout the LED on hot days.
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
http://sanfrancisco.ibtimes.com/arti...ger-photos.htm
AEO is offline   Reply With Quote
Old 03-23-09, 12:19 PM   #4
Unknown Cyclist
Senior Member
 
Join Date: Jul 2008
Location: UK
Bikes:
Posts: 1,757
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Build a headlight with some overdriven R2s mounted on the batteries ?
Unknown Cyclist is offline   Reply With Quote
Old 03-23-09, 12:22 PM   #5
Ziemas
Senior Member
 
Ziemas's Avatar
 
Join Date: Nov 2004
Location: Riga, Latvia
Bikes:
Posts: 10,082
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Sounds like a problem with your batteries. Try some higher quality rechargeables.

FWIW, I've used Fenix lights in some really cold temps (-20c) and have never had a problem.
Ziemas is offline   Reply With Quote
Old 03-23-09, 03:47 PM   #6
no motor?
Senior Member
Thread Starter
 
no motor?'s Avatar
 
Join Date: Dec 2005
Location: Chicagoland
Bikes: Specialized Hardrock
Posts: 4,954
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Quote:
Originally Posted by bicycleflyer View Post
Well the non rechargeable batteries are most likely alkaline. Those perform miserably in cold temps, even in the 40s their performance drops off. So stop using those. As for the rechargeable batteries I am not sure. Are they NiMh, or NiCad? There are a whole lot of variables that affect their performance. Most can be traced to a poor charger. Other things we would have to know more about so we can help you would be their age, capacity, brand, and what type of charger you are using.
I'm using NiMh rechargables, the LaCroose batteries that came with the BC900 charger I bought a little over a year ago. I reconditioned them on the lowest setting before I started riding after dark again, and they were around their 2400 mah rating. They had been used weekly until Thanksgiving last year when it suddenly got cold and snowed like crazy for most of December.
no motor? is offline   Reply With Quote
Old 03-23-09, 03:49 PM   #7
no motor?
Senior Member
Thread Starter
 
no motor?'s Avatar
 
Join Date: Dec 2005
Location: Chicagoland
Bikes: Specialized Hardrock
Posts: 4,954
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Quote:
Originally Posted by Ziemas View Post
Sounds like a problem with your batteries. Try some higher quality rechargeables.

FWIW, I've used Fenix lights in some really cold temps (-20c) and have never had a problem.
I thought it worked a lot better last year, I've got some other batteries I'm going to try and see how they work.
no motor? is offline   Reply With Quote
Old 03-23-09, 04:21 PM   #8
AEO
Senior Member
 
AEO's Avatar
 
Join Date: Jun 2007
Location: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
Posts: 12,258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
your NiMH batteries are probably getting shorter life and smaller charge capacity after a year's worth of use.
plug in some new ones, see what happens.
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
http://sanfrancisco.ibtimes.com/arti...ger-photos.htm
AEO is offline   Reply With Quote
Old 03-23-09, 07:21 PM   #9
bicycleflyer
747 Freight Pilot
 
bicycleflyer's Avatar
 
Join Date: Aug 2008
Location: Ohio, USA
Bikes: Rivendell, Bike-Friday Pocket-Rocket and one home made fixed gear
Posts: 458
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
That BC900 has a refresh function, have you tried it. Just make sure you don't need the batteries for about 3 or 4 days because that is how long it takes the BC900 to complete a refresh cycle. If that still does not improve things, then maybe your batteries are toast and it's time for a fresh set.
bicycleflyer is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 01:38 PM.