Remote fob battery charge time?

[SuperMono]

OK I got around to replacing the (rechargable) battery in my D3 key fob.

However, having changed my remote battery, how long will it take to charge up?
Is a short drive around the block going to be enough or is it a long drive in the country?

[CaverD3]

Tape the new one to the existing and it will charge both by induction.

[SuperMono]

Trying that, no action after about 90mins or so (over 3 shorter trips) on the new battery.

If nobody actually knows how long it takes to charge a new fob battery, maybe I have a seperate fault

[bbyer]

I do not know how long it takes for one of those lithium batteries to be fully charged. In theory however, a new battery should come near fully charged, so the remote should have probably at least locked the doors - I say locked, as with unlocked - where is the other key? I always keep a window down when I am fooling with the door locks.

I also assume the repaired remote will still operate the ignition so something is working. The removed battery, do you still have it and how close to 3 volts is it?

I would expect it takes more like a week of normal day trips to get one of those batteries fully charged. I kind of think those induction systems are more for keeping a battery up or back up rather than being what one might call a battery charging system. Also those batteries are generally in memory circuits that are normally always alive, hence the battery cannot be overcharged, but probably takes a long time to get to full charge.

The battery data sheet is below for what that is worth. The VL2330/1HF battery is the one often used.

[sniegy]

It may be charged but not programmed to the vehicle, it just may have lost its link !?