Dead Key Remotes Thread..... may have something but not sure

[Tominizer]

I cut mine open along the edge with a razor blade. Just go slow and be patient.


OK, on another note.............. upon inspecting the *guts*, I can see no way that this battery is recharging while in the ignition. I don't who the f-k told me this............. but I've always been thinking she's a rechargable battery. But I can't see ANY connection between the blade and the board inside the key.

THUS, if this is the case, the battery should be able to be replaced with a normal off the shelf one to get the key powered up again. Thoughts


So......... if I'm right on this, that should eliminate the battery power issues. Then next I'll be after the programming/signal concerns.............


I've been much too busy lately to follow up on this issue, but I will continue to see what I can do this weekend. I think I may have some spare time on my hands.

[CharlieHustleX5]

The Battery is a Panasonic Lithium Battery, part number VL-2020. That specific part number is a Lithium Rechargeable coin cell battery according to Panasonic's catalog.

I understand there is no connection between the key and the battery, but the battery does recharge while the key is in the ignition and the car on. If you still have a hard time believing that, look in your owners manual regarding the charging of the keys and it'll tell you the same.

[statdoc]

Originally Posted by CharlieHustleX5

I understand there is no connection between the key and the battery, but the battery does recharge

Maybe some sort of induction circuit, via proximity?

[CharlieHustleX5]

Originally Posted by statdoc

Maybe some sort of induction circuit, via proximity?

Thats exactly what I was thinking. When the key is in the ignition, it activates something within the key to close the circuit and charge the battery. Then when removed from the ignition, the charge circuit opens and the battery operates the key functions at its charged capacity. I'm not sure how, but I am sure the battery is rechargeable.

[Tominizer]

YEah but................. you can't beat the laws of nature and make energy from nothing. How the heck is that battery getting charged ????? It completely makes no sense....................... I'd really like to know how this works in laymans terms so can understand it if it's actually get recharged somehow internally as there's definitely NO connection that I could find to the ignition system.

Are we being hosed !?!!??!? BMW scam !?!?! LMAO

[franc x5]

Originally Posted by Tominizer

YEah but................. you can't beat the laws of nature and make energy from nothing. How the heck is that battery getting charged ????? It completely makes no sense....................... I'd really like to know how this works in laymans terms so can understand it if it's actually get recharged somehow internally as there's definitely NO connection that I could find to the ignition system.

Are we being hosed !?!!??!? BMW scam !?!?! LMAO

you can always do what you wanna do, if you insist you can install non-rechargeable battery but dont blame us if that battery will explode in your ignition. IMHO.

[tonycajjo]

Originally Posted by Tominizer

YEah but................. you can't beat the laws of nature and make energy from nothing. How the heck is that battery getting charged ????? It completely makes no sense....................... I'd really like to know how this works in laymans terms so can understand it if it's actually get recharged somehow internally as there's definitely NO connection that I could find to the ignition system.

Are we being hosed !?!!??!? BMW scam !?!?! LMAO

magic. haha no. i'm not 100% sure how the BMW is set up but the key system has a transmitter. The transmitter has resonance circuits including antenna coils that can be electromagnetically coupled. using a capacitor and a diode The capacitor can be charged with a voltage induced by the coil when the resonance circuit resonates. The key is able to slowly charge the battery with the power generated.

yikes, i feel like im in class again and its makin me tired.

anyhow dont put a non-rechargeable battery in there, it can explode.