Author Topic: Transponder Battery Low  (Read 1428 times)

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Offline Mxboost

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Transponder Battery Low
« on: March 05, 2018, 12:27:55 am »
How long should the transponder batteries last?  I changed mine two years ago, and I got a low battery message again yesterday.  The funny thing is the message appeared, and flashed for the entire leg of my trip.  Since then, it has never appeared again.
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Offline jwh20

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Re: Transponder Battery Low
« Reply #1 on: March 05, 2018, 12:34:00 am »
It seems like they usually last a year or two.  Your situation sounds about right.
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Offline S Smith

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Re: Transponder Battery Low
« Reply #2 on: March 05, 2018, 01:39:19 am »
Battery voltage probably near the limit set to indicate Batt Low condition. It may report either way until it remains steady under the limit. Just replaced the battery in my fob a week ago... the date of install I marked on the old batt was 2+ years ago.... in line with past batt replacements I've done. HTH




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Offline Mxboost

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Re: Transponder Battery Low
« Reply #3 on: March 05, 2018, 03:03:17 am »
Good to know.  What battery does it take again?
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Offline Guest

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Re: Transponder Battery Low
« Reply #4 on: March 05, 2018, 03:12:23 am »
What battery does it take again?

CR2025

Offline Skiee

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Re: Transponder Battery Low
« Reply #5 on: March 05, 2018, 07:09:24 am »
It seems like they usually last a year or two.  Your situation sounds about right.
+1
I change mine every year in April.

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Offline ghostrider990

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Re: Transponder Battery Low
« Reply #6 on: March 05, 2018, 02:06:32 pm »
Search is your friend.  :beerchug:

I replace mine every two years, regardless if it's showing low or not.

CR2025.  Good insurance.

gr
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Offline 4Bikes

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Re: Transponder Battery Low
« Reply #7 on: March 05, 2018, 03:14:16 pm »
I carry a spare CR2025.  When it gives up, I replace it the next time I stop. That's what I did the last two times, and IIRC it's about every 2 1/2 years.   Not a big deal, but I like the idea of the annual replacement better. 
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Offline Mxboost

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Re: Transponder Battery Low
« Reply #8 on: March 06, 2018, 12:53:54 am »
Thanks, and good idea.  I'll start changing it annually.
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Online Buzzard

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Re: Transponder Battery Low
« Reply #9 on: March 07, 2018, 03:57:58 pm »
I just changed my FOB battery last week.
Leaving the gas station the warning symbol came on. Got a little frustrated, 7:30 am 35 degrees, sitting in the drug store parking lot making the battery swap.
The bike is a 2016 so I guess about 2 years would be about right for a change to be due.
Setting up an annual swap date seems like a good idea now, so Jan 1st is marked on the calendar.

btw: pay attention to the battery  + / - side orientation. If it's inserted backwards it won't work :-[.
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Offline TimR

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Re: Transponder Battery Low
« Reply #10 on: March 13, 2018, 04:26:24 am »
You can still turn the stove key and start the bike even with a completely dead transponder battery. Take the key out of the fob and put the resulting blank space on the fob on a notch located below and in front of the stove key. Will work even with the battery completely removed.
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Offline ron203

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Re: Transponder Battery Low
« Reply #11 on: March 13, 2018, 07:11:24 am »
I had just read this thread on Saturday and went out for a couple of errands, when at stop #2, I got the low battery alert. Stop #3 was at Ace Hardware to get a key made for something else and pick up a fob battery. Changed it there and failed to notice which sign was up/down. Good thing to practice starting with a dead fob.   ;D 

Went home, flipped the battery over (+ side DOWN, btw) and all's good. I think I'm going to start changing it with daylight savings time, just in case...
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Offline TimR

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Re: Transponder Battery Low
« Reply #12 on: March 13, 2018, 07:55:47 pm »
I had to replace my fob battery today too. But I decided a couple of years ago to wait till the bike complained. I got almost 2 years out of the last Energizer. Sure glad you guys just had to bring the subject up.  ;)
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Offline gilbysan

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Re: Transponder Battery Low
« Reply #13 on: March 15, 2018, 04:01:43 pm »
Gents,

I recently picked up my '12 Connie and have not changed out the battery yet.  It had only 2K miles on the bike which to me was odd, but whatever I guess.  I will change out the battery today just in case.  Carrying a spare is a great idea if only to lend to someone who needs one in the field.

Tangentially, I noted that like my '13, the '12 shows low TPMS battery when starting out and the ambient temp gets down into the 30s until it warms up through running, then goes off.  The colds effect on battery output?  Kind of like my joints when I first wake up?

Gilbysan
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Offline ron203

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Re: Transponder Battery Low
« Reply #14 on: March 15, 2018, 06:22:24 pm »
Cold normally slows the  chemical reactions in the battery, so I'd think so. My helmet communicators and phone (when mounted on the bike in the cold wind) show similar issues. I keep my fob in my pocket so it normally stays warm against my leg.
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Offline 4Bikes

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Re: Transponder Battery Low
« Reply #15 on: March 15, 2018, 06:27:20 pm »
I ride a bicycle with a wireless sending transmitter and the receiving speedometer unit. When it’s cold, the cr2032 batteries start failing after a few miles in the cold. It usually happens at 35 degrees or less. Using brand new batteries does help.
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Offline lather

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Re: Transponder Battery Low
« Reply #16 on: March 16, 2018, 12:42:42 pm »

Offline ron203

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Re: Transponder Battery Low
« Reply #17 on: March 16, 2018, 04:41:15 pm »
Well, the things you learn on this forum!
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Offline MAN OF BLUES

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Re: Transponder Battery Low
« Reply #18 on: March 16, 2018, 06:25:15 pm »
This explains it well:
http://www.spectrumbatteries.com/id6.html


Good stuff there, and as an engineer that has worked on the design of sealed "multicell flatpack batteries" such as those used in phones and laptops... (and even constructed into automotive type batteries like the Shorai motorcycle batts) reading further explains major issue of instant cranking power, and loss of a major amount of initial available current, in those products.. and why they say to "turn on the headlights" for about 20-30 seconds to "warm up" those batteries so they deliver full ampacity during starting...
http://www.spectrumbatteries.com/id7.html

While the passivation layer doesn't actually form on the inner surfaces of a "can" when used in flat pack products, it does still occur in the polymer cathode/anode "separator film "deviders" between the cell layers During periods of inactivity.

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