Battery voltages are as follows - resting = 12.8V; cranking = ~10V; idle = 12.9; 3,000 RPM = 13.8V. Battery is OEM Banner and is kept on a conditoner is 18 months old. Less than 10.5 V during cranking might indicate that the battery is pining for the fjords. There also seems to be a tendency for some ECUs and possibly some other electronics to drop out with low voltages. If the battery can be topped-up I'd check the levels. And repeat those voltage measurements every so often so that you can spot deterioration before it lets you down somewhere awkward. ... Replicating issue while stationary - I'll have a go when it gets dark, but a I expect it won't appear. The 'dim ign light' only happens under full acceleration and full load. Even backing off a little seems to make the light go out. The misfire / 'cough' similarly only happens at full accel / under load and in usually around the 4,000RPM area. Turning the headlights on might increase the load on the alternator enough to help discover if the voltage is dropping. .., Low RPM charging issue - not heard about that before, could you share a link? Previous discussions: 1, 2, 3. Jonathan