The key fob battery had died after about two years of usage. So, replaced the CR2025 battery about a month or so ago with a Duracell. Yesterday, the key fob would not work. Had to replace it again. What could cause the battery to die so fast? Has anyone experienced this issue?
2016 CX-5 Sport key fob battery died in about a month
- Thread starter txt990
- Start date
So, I was at the store when this happened and could not find a CR2025. They only had CR2032, which I was able to use after checking online.
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- 2016.5 CX-5 GT AWD titanium/black 2016 Miata Club ST MT white
Whenever I change batteries, in anything, I always check the new battery with my multimeter.
True, the battery being tested is not under any sort of load when I check it but if the voltage is over the stated amount, it normally means that the battery is good.
True, the battery being tested is not under any sort of load when I check it but if the voltage is over the stated amount, it normally means that the battery is good.
HyFlyer
2019 CX5 sig 2.2 diesel / 2016.5 CX5 touring 2.5na
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- Southwest Ohio
Yeah, the 2032 is a bit thicker (.7mm) and the little internal "cover" won't quite fit right but the key fob still snaps back together. The 2032 is a higher capacity battery and will serve you mo-gooder-er
7eregrine
The man, the myth, the legend
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- Land of Cleve
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- 2016.5 CX5
I don't think that's true at all. I believe it's passive. You press the unlock button and the car then looks for the fob. If it finds it, then it unlocks. You would have to build way more tech into the fob if you enable it to know it's near the car and then starts to broadcast.
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- Plano, Texas, USA
You could have got low-quality、out-of-date counterfeit batteries. Don’t buy any batteries from that store.
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- Plano, Texas, USA
OP’s original battery lasts for 2 years. I don’t believe your scenario matters as he won’t change his habit on this.
7eregrine
The man, the myth, the legend
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- Land of Cleve
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- 2016.5 CX5
I know. My original batteries last over 4 years. I bought some from the local drug store and they have lasted for over 2 years now. Never buying from Amazon again.
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- 2016.5 CX-5 GT AWD titanium/black 2016 Miata Club ST MT white
Supervolt?
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- 2016.5 CX-5 GT AWD titanium/black 2016 Miata Club ST MT white
I've been buying batteries from Amazon for years and NEVER had an issue with so called counterfeit batteries. I've bought just about every name brand of battery from Amazon and their house brand. NEVER an issue.
Back in the day when I used to have to work for a living, I was in charge of purchasing for my department, everything from batteries to computers. Guess where I purchased the batteries from?
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- 2016.5 CX-5 GT AWD titanium/black 2016 Miata Club ST MT white
And that's cool, Conrad. Glad you've had success. I'll continue to get mine from Discount Drug Mart that is on my way to work.
You can't go wrong with Supervolt!
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- 2022 CX-5 Turbo
Stand corrected.
- from Wiki
The system works by having a series of LF (low frequency 125 kHz) transmitting antennas both inside and outside the vehicle. The external antennas are located in the door handles. When the vehicle is triggered, either by pulling the handle or touching the handle, an LF signal is transmitted from the antennas to the key. The key becomes activated if it is sufficiently close and it transmits its ID back to the vehicle via RF (Radio frequency >300 MHz) to a receiver located in the vehicle. If the key has the correct ID, the PASE module unlocks the vehicle.
