Ok, I just got the Renata battery for my IS250 key transponder. WHen I tried to open it, I couldn't find any screws or any way of opening it. It looks sealed. How do you pry it open safely?

 

take out the metal key, use either that or a flat screw driver, put it in the hole, and pry it open with some force. you just have to have faith that you won't break it.

I think it's also in the manual...

 

you can use a dime instead of the screwdriver....

 

Or you can use your valeting key and stick it into the groove. It should be the right fit.

 

I'll check out the manual. I still have plenty of charge in my key. I just want to put a new one in because I've had it for a year already. Plus, the battery was so cheap too I just can't resist not getting it, lol.

Ok, so the hole where the mechanical key use to sit can be pryed open. I thought about doing that because it seems like the most logical place to start but it was held together pretty firmly.

If I were to break one of these things, don't they cost like $200 or something? That would suck.

 

Dont worry....it wont break....

I tried it with the transponder from the loaner car.....

You wont break anything

 

The plastic is cheap. When I used a flathead screwdriver, a piece of the plastic from the key chipped away slightly. Looks like I'll have to use a rubber band next time to cushion the screwdriver from digging deeper into the plastic tab.

The Renata battery by "swatchbattery.com" from eBay is not good. It came without packaging, just a stupid little piece of cutout cardboard with the label Renata on it. I will NEVER buy from that person again. I rather pay higher price next time. Cheap. It's made in Switzerland though so I guess that's kind of good.

But I popped the darn open finally. After that, it was fairly easy.