Thanks guys,
I will check the battery's Amp hour this weekend.
In the meantime I will relate two "unusual" events relating to this issue.
When I bought the unit, the young salesman helped carry the heavy box to my car, where we placed it in the boot, LAYING IT ON IT'S SIDE.
24 hours later I came to remove the box, only to find that the boot mat and the box was saturated with battery acid.
I used it in this state until it showed signs of deterioration before the agent
advised me to take the unit to a repair shop where they were to change the battery. They actually replaced the entire case as acid corrosion was evident inside the case. I was assured that the entire case and battery was new.
Today on arriving home from work, the unit was beeping madly. I was confused as no load shedding had taken place.
The maid had decided to do the ironing in the lounge and had plugged the iron
into the circuit leading to the unit.
What I have learnt from this is that even if the power is on, and the unit is not running, it must still not be overloaded.
Presumably if it is switched off, this would not be the case.
Cheers.
Do you have any idea how much power an iron uses? A mother-load of wattage. I can't remember all the details about battery care, but I don't remember laying a battery on it's side has ever been a good idea.