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#4443032 - 06/27/17 06:02 PM Key fob batteries lasted 15 yrs
mclasser Offline


Registered: 04/13/13
Posts: 2229
Loc: The Northeast
I changed my Accord's key fob battery and saw the old one was a made in Japan Panasonic. I then got curious, opened up the spare key fob and it also had a Panasonic battery. I've had this car since new and don't remember ever replacing these batteries. If I did, I would see Energizer or Duracell since they're the most common at stores. Pretty neat the originals lasted this long.
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#4443036 - 06/27/17 06:07 PM Re: Key fob batteries lasted 15 yrs [Re: mclasser]
Wolf359 Offline


Registered: 04/27/12
Posts: 4753
Loc: MA
Are you sure the dealer never changed it?

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#4443067 - 06/27/17 06:41 PM Re: Key fob batteries lasted 15 yrs [Re: mclasser]
Nick1994 Offline


Registered: 02/19/13
Posts: 10111
Loc: Phoenix, AZ
Often times they do last for a long time.

My mom sold her 2003 Buick Rendezvous last year, had the original batteries in the fobs.

Grandparent's have a 2002 Chevy Trailblazer, original fob batteries.

Sold my 11-1/2 year old VW in 12/2015 and it had the originals too.
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#4443081 - 06/27/17 06:52 PM Re: Key fob batteries lasted 15 yrs [Re: mclasser]
skyactiv Offline


Registered: 03/02/13
Posts: 4397
Loc: The Midwest
I've already replaced mine. But, mine gets depleted faster to roll my windows up and down. A fraction of a second vs holding down on a button for 6 seconds to roll the windows down and let the heat escape as I'm walking to my car from Kroger... . I think a few Honda models allow the same battery zapping feature.


Edited by skyactiv (06/27/17 06:55 PM)
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#4443082 - 06/27/17 06:54 PM Re: Key fob batteries lasted 15 yrs [Re: mclasser]
bdcardinal Offline


Registered: 06/03/05
Posts: 10992
Loc: Santa Barbara, CA
The older ones that were just for lock and unlock lasted forever. The newer ones for cars with push button start and proximity unlocking last about a year or so.
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#4443089 - 06/27/17 07:02 PM Re: Key fob batteries lasted 15 yrs [Re: mclasser]
Quattro Pete Offline


Registered: 10/30/02
Posts: 35863
Loc: Great Lakes
The ones in my bmw keys are rechargeable. They recharge whenever the key is sitting in the ignition. The original lasted close to 15 years, but the battery is not easily replaceable. And of course if you dont use the spare key for a while, it'll go dead.
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#4443197 - 06/27/17 09:07 PM Re: Key fob batteries lasted 15 yrs [Re: Quattro Pete]
pkunk Offline


Registered: 03/19/11
Posts: 257
Loc: NM, USA
Originally Posted By: Quattro Pete
The ones in my bmw keys are rechargeable. They recharge whenever the key is sitting in the ignition. The original lasted close to 15 years, but the battery is not easily replaceable. And of course if you dont use the spare key for a while, it'll go dead.

And cost hundreds for a new key
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#4443211 - 06/27/17 09:22 PM Re: Key fob batteries lasted 15 yrs [Re: mclasser]
bioburner Offline


Registered: 09/19/16
Posts: 1418
Loc: Minnesota
My garage door is still original. Was new in 2005. Same with the battery in the bathroom scale but is blinking now so wants to be changed or maybe complaining about my weight gain.
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#4443260 - 06/27/17 10:23 PM Re: Key fob batteries lasted 15 yrs [Re: mclasser]
901Memphis Offline


Registered: 08/14/10
Posts: 12893
Loc: Northern Kentucky
Mine don't last very long for my Buick maybe a few years, I notice that the range gets reduced as the batteries age
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#4443338 - 06/28/17 12:08 AM Re: Key fob batteries lasted 15 yrs [Re: mclasser]
daves87rs Offline


Registered: 02/23/09
Posts: 16964
Loc: Michigan
I have one fob at ten years now...
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#4443472 - 06/28/17 07:15 AM Re: Key fob batteries lasted 15 yrs [Re: Quattro Pete]
mightymousetech Offline


Registered: 04/03/17
Posts: 1444
Loc: Ontario, Canada
Originally Posted By: Quattro Pete
The ones in my bmw keys are rechargeable. They recharge whenever the key is sitting in the ignition. The original lasted close to 15 years, but the battery is not easily replaceable. And of course if you dont use the spare key for a while, it'll go dead.


That's only if you don't have comfort access. With the comfort access version of the key, they have an easily replaceable battery. Usually replace mine every two years just to be safe.
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#4443548 - 06/28/17 08:42 AM Re: Key fob batteries lasted 15 yrs [Re: mclasser]
RoGuE Offline


Registered: 02/05/08
Posts: 680
Loc: Atlanta, GA
Original batteries in the fobs for a 2002 Suburban and a 2002 Tahoe. My 2007 Malibu however has the batteries outlast the remote itself.


Edited by RoGuE (06/28/17 08:42 AM)
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#4443836 - 06/28/17 12:40 PM Re: Key fob batteries lasted 15 yrs [Re: mclasser]
nthach Offline


Registered: 01/02/04
Posts: 3898
Loc: California
I just replaced the battery for an Accord's keyless entry - it was the original Panasonic. I happened to be by a dealer and they gave me a Maxell replacement cell.

The key fob battery for my car has been replaced twice, I have an Chinese-made Energizer in it. But I have SmartAccess.

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#4444254 - 06/28/17 08:09 PM Re: Key fob batteries lasted 15 yrs [Re: mightymousetech]
Quattro Pete Offline


Registered: 10/30/02
Posts: 35863
Loc: Great Lakes
Originally Posted By: mightymousetech
Originally Posted By: Quattro Pete
The ones in my bmw keys are rechargeable. They recharge whenever the key is sitting in the ignition. The original lasted close to 15 years, but the battery is not easily replaceable. And of course if you dont use the spare key for a while, it'll go dead.


That's only if you don't have comfort access. With the comfort access version of the key, they have an easily replaceable battery. Usually replace mine every two years just to be safe.

Yes, mine obviously have the discomfort access.
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#4444348 - 06/28/17 09:21 PM Re: Key fob batteries lasted 15 yrs [Re: pkunk]
Wolf359 Offline


Registered: 04/27/12
Posts: 4753
Loc: MA
Originally Posted By: pkunk
Originally Posted By: Quattro Pete
The ones in my bmw keys are rechargeable. They recharge whenever the key is sitting in the ignition. The original lasted close to 15 years, but the battery is not easily replaceable. And of course if you dont use the spare key for a while, it'll go dead.

And cost hundreds for a new key


My Mercedes key have keyless go and they're about $500 from the dealer, the regular keys are about $300. There was some TSB that mentions that dealers should replace the batteries in the fob whenever the customer comes in for service. Some dealers even do it for free. Mine only end up lasting around 6 months or less, I've tried several brands but they all seem about the same, but maybe I should just stop buying them from eBay, they're probably all fakes even with the brand name. But even the one the dealer put in only lasted 6 months so even if they're fakes, they're still lasting as long as the dealer.

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