>>> Any idea how many years the battery lasts??
>> It varies.
>>> Is it easy to replace ??
>> It depends on the car.
>>> Do you lose any memory changing over ??
>> What were we talking about?
> Its for a Picasso, programmed key, cost a lot for a dealer to replace
> code if lost
The code won't be stored in a battery-volatile memory in the key, so you'll
be able to replace that easily enough.
As for how long they last - I dunno, but the same battery's been in the key
for my XM since I bought it 5 years and 60k miles ago - over half the car's
life. So it's probably the original, and still working at 9.5yrs and 120k
miles.