Jinggyjin

Is anyone using 2032 instead of the 2025 battery for their car keys? Mine got a 2032 in it and I think the battery is kind of stuck there.. need some help.

thanks guys!!

pjw1967

They are the same voltage. The last 2 numbers are the thickness. 25 mm and 32 mm. My '14 ML350 came with 2025.

Gungaslow

I use AA size

TA Canada

My '15 ML350 BT uses the 2025 too.

otakki

Interesting information! Didn't know that's the only difference! I think you meant 2.5mm and 3.2mm. 25.4mm is 1 inch. So that means 32 has more capacity than 25, right?

pjw1967

Yes, I needed a decimal point. I guess batts have an amp/hour rating.
From Google:
The CR2025 is thinner than the CR2032, but they otherwise seem to be interchangeable — assuming you can make them fit your device equally well. The thicker CR2032 is typically rated for 240 mAh whereas the thinner CR2025 is typically rated for 163 mAh.

Gungaslow

I put AAs in mine..

eddieo45

I put 2032's in my W209 key on Friday and today the Keyless Go wouldn't work; had to insert and turn the key. When my appointment was over I went to start the car and key wouldn't turn! MBUSA said that key batteries "have nothing to do with" the key turning, just locking and unlocking, but after moving the batteries around a bit I was able to get the little red LED to light and, sure enough, the key turned and car started.

You best believe I went straight to the dealership for some free CR2025 batteries and a wash!!

jmwigen

Batteries will last a lot longer if you put your fobs in a metal tin or an RFID proof bag so the fob isn't constantly trying to communicate with the car.