Battery life for key fob...How long does yours last?

yrwei52

2016 Mazda CX-5 GT AWD w/Tech Pkg
Contributor
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Plano, Texas, USA
⋯ I did NOT test the fob prior to disassembly, as I didn't want electricity from the battery going who knows where inside.
Yes, this’s the key. All electronic components are supposed to be “water-proof” and won’t get damaged only by water. But the short circuit with electricity current will.
 
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2020 CX5 Signature
Are the FOBs certified for HE washers? Also I may try getting mine Dry Cleaned with extra starch! sorry..had to,,,but great job Ladd with the recovery!
Hah! Good one.

I see that I left out the word "accidentally" in my brief story. :)
 
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2020 CX5 Signature
Yes, this’s the key. All electronic components are supposed to be “water-proof” and won’t get damaged only by water. But the short circuit with electricity current will.
There is a silicone gasket around an inside perimeter; perhaps that helped protect the circuit board.
 
I purchased a new CX5 2/2019. Recently, I've been getting a message when I park that I have a low battery in my key fob...Is this normal for everyone else?

It seems a bit fast compared to my last car...I do sometimes leave my keys in my car overnight in the garage and I wonder if that is contributing to the drain..

Also does anyone know which battery the 2019 CX5 key takes?
Thank you
I have a CX5 2017, my key fob takes DL/CR 2025...DL stands for Duracell... you can always Google it to make sure, i did
 
owners manual states replace yearly...batteries are like $2.50 and easy replacement. keep a few around...it no big deal...the duracell possibly could last year a half.... but hey...not sure if there is a drain.. it more about proximity and use....
 

7eregrine

The man, the myth, the legend
:
Land of Cleve
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2016.5 CX5
4 years... 4. 4. Y'all are crazy replacing them before they need to be. "It's only 2 dollars" I don't give AF if it's free. hahaha
It's not like they don't give you a warning that the battery is dying.
/Looks around the forum for people who got locked out of their cars because the battery remote died suddenly.... none?!?!? Hmmm.
And I still haven't replaced the batteries in my remote start fobs. From Nov 2016.
Maybe I just got lucky with freakishly strong batteries.
 
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Occupied Calif.
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2019 CX 5 GT-R
I bought my CX 5 in May 2019. I got a low key battery warning a couple of weeks ago. I replaced the battery in the fob that I use daily and put a spare new battery in the drawer with my extra fob. The battery package says it has a shelf life until 2028 so the extra battery should be good insurance for a while.
 
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2019 CX-5 Signature
...
And I still haven't replaced the batteries in my remote start fobs. From Nov 2016.
Maybe I just got lucky with freakishly strong batteries.

I have never had to replace fob batteries this quick. Both fobs have given low battery warnings on our 2019 and batteries have been replaced. There appears to be something different going on with recent model years, as I have seen several posters mentioning battery life of around 18 months. That, or they changed the notification requirements. I'll remember to check the voltage of the battery next time it gives the warning.
 

yrwei52

2016 Mazda CX-5 GT AWD w/Tech Pkg
Contributor
:
Plano, Texas, USA
4 years... 4. 4. Y'all are crazy replacing them before they need to be. "It's only 2 dollars" I don't give AF if it's free. hahaha
It's not like they don't give you a warning that the battery is dying.
/Looks around the forum for people who got locked out of their cars because the battery remote died suddenly.... none?!?!? Hmmm.
And I still haven't replaced the batteries in my remote start fobs. From Nov 2016.
Maybe I just got lucky with freakishly strong batteries.
Like you I usually would wait for the “Key fob battery low” message and replace the battery. But my key fob didn’t give me any warnings this time and the only symptom is I can’t unlock the door the first thing in the morning. The Panasonic CR2025 battery in the key fob was installed on 2/23/2016, and it had lasted for almost 5 years. A new Panasonic CR2025 resolved the issue. The CR2025 in wife’s key fob was installed on the same day in 2016, and her key fob has no trouble to unlock the door so far, and she is the main driver for our 2016 CX-5.

Anyone else having trouble unlocking their CX-5 with the fob?
 

ColoradoDriver

Gen-1 Kodo Design
Contributor
:
Denver, CO
:
2014 CX-5 Touring
Just replaced my fob battery 2 weeks ago. Last time I replaced it was back in 2018.
 
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