Thread: battery in key

Was told on my D3 that key battery charged when in ignition, and locksmith (who makes and programs new keys) reckons that battery key on L322 also charges in ignition.

I tend to use one key mostly and leave others for spares, but if they have to be used to charge, then I don't want to find that I go to use spare and battery has died because I wasn't using it.
Just cannot find any certain information one way or the other.

If your D3 key fob is a sealed unit, the battery is a rechargeable one. It recharges by induction when the key is in the ignition.
You can recharge your spare key by rotating which key you use a few times each year. Alternatively, if your spare has gone completely flat, you can tape the spare key on the steering column near the ignition point whilst using the main key.
best wishes Jeffoir.