Thanks for your help. My remote is, indeed, also a red one (for a '01 166). If I was to pop in two equivalent batteries, either 2025 or, I think, 2016, which are also 3v like the 2032 but thinner, wouldn't I be doubling the current to 6v? Surely this'd damage the unit? Incidentally, this problem has only occured since about three months ago when, given that I'd never previously changed the battery in the six years I have the car and the little light on the dashboard began to stay lighted which is (according to the manual) the telltale sign that the battery is dying, I though nothing on simply replacing the battery with a like-for-like. However, since then I've gone through three brand new ones. BTW, the remote's led doesn't light up except when I'm operating it. Thanks for your help.