Battery consumption with the OM2SP and the OM4 was not one of their finer points. The later OM4 models and the OM4Ti were OK after the circuit boards were modified. There was a way to tell which model of the OM4 was OK but I cannot recall at this minute.
Mind you I did have reasonably good luck with the OM2SP when I remembered to turn the Shutter speed ring around the lens to the 'B' position when I had finished and this seemed to stop all battery usage when it wasn't being used and not just 'switched off' and the batteries lasted a lot longer.
Last edited by BMbikerider; 10-30-2012 at 12:25 PM. Click to view previous post history.