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Old 05-29-09, 11:45 AM   #1
gholt
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life of cateye computer batteries

Does anyone know what the typical life of a battery for Cateye computer are. I have two on sepearte bikes and it seems that they keep all the data, but registering the magnet for speed, cadence, is intermetitant.

I have checked the distance of the magnet to the sensor to make sure it is correct. I've also checked the cable to see if any shorts, and I can't find any. Any suggestions?
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Old 05-29-09, 12:06 PM   #2
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What happens to mine ... more than occasionally ... is slight oxidation on the connection between the mount and the back of the computer.

I use fine sandpaper (and should use a dab of dielectric grease) to clean it up.

Solves the problem.

I have to do it a couple times a year, though.
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Old 05-29-09, 12:18 PM   #3
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You can clean the contacts with just a pencil eraser too. Works well on old computer parts too.

You might also try replacing the ferrite magnet with a much stronger neodymium magnet. It will give you a lot more room for error when it comes to the magnet to sensor proximity.
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Old 05-29-09, 12:24 PM   #4
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I may replace the magnet. The chrome coating on my mt bike is starting to wear.
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Old 05-29-09, 01:11 PM   #5
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Most likely the contacts on the back of the computer are corroded, or there may be some damage to the wiring.
The battery in the computer should last at least 2 years.

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Old 05-29-09, 01:13 PM   #6
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My track-record for the batteries has been a year. That's when I'll start getting no or erratic readings. I haven't, yet, had a problem with the contacts. Nor do I ride them in the rain.
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Old 05-29-09, 06:57 PM   #7
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My Cateye computer last about 3 years, but if it's wireless the sending unit battery last about 8 to 9 months.

If one or both of your Cateyes are less the 2 years old, Cateye will quickly resolve your issue.
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Old 05-29-09, 07:01 PM   #8
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All of my Cat-eyes are wired and I've had batteries last 5 years and more.

+1 on cleaning the contacts on the back of the head and on the mount. A pencil eraser is a good cleaner and a small dab of silicone grease will keep out water and crud. With any reasonable care, these things are super reliable.
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Old 05-29-09, 09:28 PM   #9
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Per some Cateye manuals I have wired compute batteries should go about three years and wireless one year, dependent on usage. The average is listed for 1 hour use per day as I recall.
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Old 05-29-09, 10:03 PM   #10
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Quote:
Originally Posted by HillRider View Post
All of my Cat-eyes are wired and I've had batteries last 5 years and more.
.
What's interesting about that is that I've found the replacement batteries to last longer then the factory installed batteries. I still have an old Cateye that is sitting in my tool box that's about 23 years old, and the last time that battery was changed was 9 years ago before I got the Wireless, and that thing is still displaying! Of course it hasn't been on bike all those years either.
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Old 05-29-09, 10:06 PM   #11
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The OEM batteries ... just like on so many Asian imports ... aspire to be crap.

Really low mA-h, or similar.

It's almost worth changing out batteries on any of these gizmos on day 1.
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Old 05-29-09, 10:23 PM   #12
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Both my Cateye's - Strada Wireless - are obviously wireless. I should have pointed that out. Anywho, BatteryBob has the batteries for cheap - and no shipping charge. So I don't mind putting in new ones each year.

http://www.batterybob.com/
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Old 05-30-09, 06:04 AM   #13
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Quote:
Originally Posted by tatfiend View Post
Per some Cateye manuals I have wired compute batteries should go about three years and wireless one year, dependent on usage. The average is listed for 1 hour use per day as I recall.
My experience is that number is very conservative. I use my bikes well over 1 hour a day and the batteries still last much longer.

And that was the OEM batteries which, IIRC, were Panasonics, and are not junk.
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Old 05-31-09, 07:38 PM   #14
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It ended up being the contacts. I never thought of that. I have have a few years on each of the bikes. Still going strong. Just thought it might be time to switch when they weren't working.
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Old 05-31-09, 08:27 PM   #15
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Any rain involved? Mine got rained on one time and the cadence stopped working until I did a hard reset. That was about 1000 miles ago and I haven't had any trouble with it since. As for duration, mine is 3 years old and running on the original battery.
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Old 05-31-09, 10:01 PM   #16
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I'll just chip in here, when you do replace the battery, avoid getting fingerprints on it, the oils from your skin will give a small pathway for current, the batteries have so little capacity ( compared to say, an AA ) that the little current draining across the fingerprint is a noticeable loss.
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