Battery in Smart Key

You could make it an annual job, like changing the battery in your smoke detector every New Year. Just change the fob battery the same month as your registration.

 

My fob battery is two months short of two years old and shows no sign of any problems.

When it does die, it's not an issue. I'll just unlock the door with the built in key, insert the fob in the dash slot, and drive to get a new battery.

I don't see it as anything requiring planing or preventive maintenance.

If a smoke detector battery dies I may die too.

If the fob battery dies, the Prius will still work just fine.

 

what I have noticed on the Classic is the fob range has decreased by about half. Not sure with the G2 as I don't use the fob, I use it SKS style so you don't know.

Edit:
CR2032 costs $3.99 each at my parts house.

 

I like it. Just do them all on one day. Boxing day buy batteries, New Years install them. Works for me! Thanks
:lol:

 

Most lithium batteries have a shelf life of around 5-10 years, so it should not hurt if you want to have them around for when they run out.

 

Let me clarify and say that the fob uses the same transmitter, and the car uses the same receiver for the remote functions as they do for the SKS. The difference is in the initiation of the fob's transmission. The former is direcly intiated by you. The latter is directly initiated by one of the SKS oscillators. To localize the location of the fob, the oscillators do not transmit at the same time, and have very short transmission distances.
But I do agree, SKS will cause the fob to transmit much more frequently than the simple remote function would.

 

If your SKS battery dies, and you need to use the mechanical key to get into the car... how do you start the car since the battery in the fob is dead?

Is power unnecessary if the fob is inserted into the dash?

/Jim

 

The same way your local walmart store can detect you walking out with some products you didn't pay for. Well, almost. Those tags are dumb.

There are passive powered RFID tags in cartons though.

 

Don't have the manual in front of me, but do have the fob...

Tiny screws? Are you referring to somthing inside holding the battery in? I don't see ANY screws at all in my fob. Makes me wonder how to get it open. I'm assuming that answer lies in RTFM. But in case that doesn't help... any advice on getting the fob case open? What about getting the battery in/out? Tag has already noted you should have a tiny jewelers phillips screwdriver handy. Any other advice from someone who has done this before?

 

Actually, a tiny straight head screwdriver will work. I used one from an eyeglass repair kit. The procedure is not difficult, as Evan pointed out, but I'm clumsy with that sort of thing and would certainly drop one or more of the screws (never to be found again) if I tried to do the replacement while sitting in the driver's seat of my car.

 

Sorry for bumping a 4 year old thread, but its good info.

To think the dealer wanted $50 to do this. I knew that sounded crazy. Damn crooks.

 

It may be an old thread, but it was topical for me. I replaced my sks fob battery today, so I'll add some data. My car is 4 and a half years old and the battery has never been changed. The sks has been slightly erratic and I figured a 4.5 yo battery might be running out of juice. Hopefully the sks will work flawlessly again.

 

If the red LED on the fob no longer flashes when you operate a fob button then the fob battery needs (or will soon need) replacing.

 

Here are some pictures of the process: 2004 Prius Keyfob Battery Change
I had to use a small flat head screw driver to pry the back cover forward instead of using pure thumb pressure.
Now to spend the $50 I just saved doing it myself.