I'm looking for a battery to replace the one in my Landis& Gyr C/H
> controller, model RWB200; I thought it didn't have battery backup, but when
> I took it off the wall there was this totally dead battery in it. >
> The controller is otherwise fine, and does all I want it to, so I'd like to
> replace the battery, but I can't find any reference to it.
>
> The cells are about 15mm diameter and 6mm thick, and in this case have been
> heat shrunk and soldered (or something) together in series. I have seen
> some in an old Maplin catalogue - single mercury equivalent cells; VQ76H -
> that look right, but theyre not rechargeable.
Number of cells? Actually, if there is physical room, probably the easiest way is to buy several AAA NiCd cells, a battery holder, snip off the old leads high on the battery, and solder on the battery holder.