Glad you posted this

.... the smart charger mentioned at the begining arrived this morning. Tried in on my lads motorcycle battery that had been flat since before xmas.... nothing, no lights on charger. Took the other 2 batteries out of the Landrover and tried to charge them..... again, not a light lit up on the charger.
I put the big battery back in the beast and managed to jump start it. Left it for 10 minutes then took it off and put it back on the charger. This time it is charging........
So these smart chargers (and maybe others) wont charge up a completely flat battery.
If this one charges up okay I will ditch the smaller one for now and I WILL secure it