Me again guy's, the Miggy has been off the road for a while now (driver licence medical reasons) and the battery has gone completely 100% flat now. Even before this i seemed to be having a bit of trouble with the battery not seeming to hold a charge. Anyone have any ideas as to why or if this is common?
Thanks.
How long had the car been standing?
All batteries suffer from "self discharge", even when nothing is connected to the battery terminals.
As the battery ages, sulfation takes place which slowly reduces the efficiency of the battery in both taking a charge (and holding it), and how much clout it can deliver when required (eg, for starting).
Add to this that every car will still pull a small current from the battery for things such as alarm systems, radio memory, etc and it won't take too long for the battery to reach a state where it can no longer perform.
As your battery has been left to completely discharge, it's odds on it will not recover from this no matter how long you leave it on charge.
If you have to leave a vehicle unused for a period of time (eg, > 1 month) I would suggest buying an intelligent battery conditioner/charger to maintain the battery while the vehicle is not in use.
A company called CTEK do a range of charger/conditioners that are designed to be permanently connected and get good reviews.