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Old 01-28-2012, 03:31 PM   #1
mrbreezeet1
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Default Batteries in keyless entry, How long do they last?

Think I used a Energizer Battery # 2032.
Put it in, in July last year, was dead this month already. So a little over 6 months.
Shouldn't they last longer than that?
Maybe I got an old pack.

This is the one for a car.
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Old 01-28-2012, 03:43 PM   #2
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Default Re: Batteries in keyless entry, How long do they last?

Fob batteries typically last years, a year with heavy usage. Either you got an old batt or there's something wrong with the unit, drawing power when it shouldn't.

My solution for coin batteries is to buy cards of them at the dollar store. They tend to be cheap makers (Sunbeam is common) and/or aging, but they work great in 99% of the things that use them and at 1/50th the cost I can replace them often.

I will buy new, brand-name ones for critical gear.
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Old 01-28-2012, 03:44 PM   #3
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Default Re: Batteries in keyless entry, How long do they last?

Same batteries for past 5 years in the fobs for my wife's car.
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Old 01-28-2012, 04:03 PM   #4
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Default Re: Batteries in keyless entry, How long do they last?

Had the same batt in my fob for 3 1/2 years and 40,000 miles. The battery was in the fob when I bought the car.
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Old 01-28-2012, 10:55 PM   #5
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Default Re: Batteries in keyless entry, How long do they last?

All the rides I have with keyless entry ('00 Stratus, '03 Cooper S, '07.5 Silverado) are still on their original batteries.
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Old 01-28-2012, 11:49 PM   #6
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Default Re: Batteries in keyless entry, How long do they last?

It also depends on the type of fob. GM's are typical momentary use signal senders so it only gets used when the button is pushed. Some vehicles (like the Nissan/Infiniti football shape ones) are actually passively in use when in proximity of the vehicle. Long idea short-don't store those in the car or within 20 feet or so. The distance for that can be checked by putting it in a place, then pressing the start button on the car. If it starts, move the fob farther away or otherwise out of signal reading ability.

Another thought, make sure the button isn't getting pressed in odd times like when the keys are in your pocket or a purse.
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Old 01-29-2012, 12:28 AM   #7
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Default Re: Batteries in keyless entry, How long do they last?

Well, sounds like I did not have good luck. Thought it should last longer than it did.
Car is a 02 Olds.
Guess I'll buy some somewhere else and try again. These were Energizer from Auto Zone, would think they were fresh.
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Old 01-29-2012, 12:41 AM   #8
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Default Re: Batteries in keyless entry, How long do they last?

usually the battery carrier tears away from the circuit board
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Old 01-29-2012, 10:50 AM   #9
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Default Re: Batteries in keyless entry, How long do they last?

The other question is, are you sure the batteries are dead? Did you test them? (What, you don't have a $10 battery tester? Shame on yez!)

I have one vehicle whose remote is maddeningly erratic - sometimes fails to work at all - and it has nothing to do with the battery condition.
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Old 01-29-2012, 10:53 AM   #10
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Default Re: Batteries in keyless entry, How long do they last?

Further by-the-way, just an interesting tech datum some may find useful: the 4-digit battery numbers for coin batteries are their physical size, in millimeters. A 2032 is 20mm in diameter, 3.2mm thick. A 2025 is thinner - 2.5mm. Etc.
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Old 01-29-2012, 11:06 AM   #11
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Default Re: Batteries in keyless entry, How long do they last?

8 years so far on my 4Runner with the original key fob battery. And its my daily driver, so the key fob gets used just about every day.
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Old 01-29-2012, 11:19 AM   #12
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Default Re: Batteries in keyless entry, How long do they last?

my 2008 X5 is still on it's original batteries... I'll likely change them soon so my wife does't have to remember how to use the manual key. Plus 1/2 the time she doesn't even know where her keys are buried in her purse.
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Old 01-29-2012, 11:41 AM   #13
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Default Re: Batteries in keyless entry, How long do they last?

98 windstar, 00 Dakota and 01 Mustang still have the original batteries in the fobs.
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Old 01-29-2012, 11:45 AM   #14
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Default Re: Batteries in keyless entry, How long do they last?

Quote:
Originally Posted by Dakota00 View Post
98 windstar, 00 Dakota and 01 Mustang still have the original batteries in the fobs.
wow, they had keyless entry as far back as 98? I guess I might be confusing keyless entry with a remote control key door unlock maybe?
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Old 01-29-2012, 11:49 AM   #15
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Default Re: Batteries in keyless entry, How long do they last?

10 years for the Fob on my 02 Volvo.

For the after market remote starter on my MDX, every 6 months.
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Old 01-29-2012, 12:04 PM   #16
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Default Re: Batteries in keyless entry, How long do they last?

My previous work vehicle, a 2007 Caravan, was still on the original battery after 4 years of many daily uses, I'd say 10-12 times a day, 5 days a week.
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Old 01-29-2012, 12:51 PM   #17
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Default Re: Batteries in keyless entry, How long do they last?

Well the battery carrier was loose, held on by only one spot, I did solder it back down. No didn't test the battery, but it wouldn't work with the old one, and did with a new one.
I just have a volt meter, guess I could test it with that.
I still have the old battery.
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Old 01-29-2012, 12:53 PM   #18
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Default Re: Batteries in keyless entry, How long do they last?

Quote:
Originally Posted by MD11 View Post
wow, they had keyless entry as far back as 98? I guess I might be confusing keyless entry with a remote control key door unlock maybe?
They had it in 92 on Grand Prix.
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Old 01-29-2012, 12:54 PM   #19
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Default Re: Batteries in keyless entry, How long do they last?

Quote:
Originally Posted by MD11 View Post
wow, they had keyless entry as far back as 98? I guess I might be confusing keyless entry with a remote control key door unlock maybe?
Not sure what to call it, it locks and unlocks the door, opens the trunk, and has the panic button.
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Old 01-29-2012, 01:12 PM   #20
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Default Re: Batteries in keyless entry, How long do they last?

my wifes 99 mazda is still on the original battery and my 04 nissan is still original
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