My Rover 216 keeps flattening the battery?

first question I would ask is how old is the battery if more than 2-3 years buy a new one it may be simply no longer able to hold a charge.
another thing to check is the condition of the wires the run back from the alternator up to the battery as these have a tendancy to corrode on the Rover and this would stop the battery getting a decent recharge from alternator so if your wiring adjacent to the battery is sort of green and dodgey looking it could be this. also make sure the earth wire on battery has a good ground where it goes on to body of car if this is loose or furred up that could also cause a problem with charging.

James Barr
November 2010