Thanks Bruce - I spent hours last night looking for that info. How did you find it? Wherever it was, could you please look again and tell me exactly what it says all the outputs are? (AC out or DC out? Volts? Watts?) The reason I ask is, I've now pulled the battery pack and found some circuitry in there too. It's just a diode and a black box that looks like either some kind of relay; an AC to DC converter; or overheat cutoff.
So it's possible the charger is just a simple "240 in, 9V AC out" - and that black box & diode converts the "charger" output to something else.
The battery pack is just four "sub C" size cells. That makes 1.2V x 4 = 4.8V. If the cells are charged directly from the charger (without going through other electronics) the charger should be *about* 6V (to allow for a little voltage drop under load). But that extra electronics makes it a pain in neck to work out what charger is needed (without buying an oscilloscope!).
