Hi Kyle, First you could investigate the presence of a battery cut-out breaker usually located on the outside of fuse box with small red button. Opening this breaker should prevent any excess current drain overnight depleting battery although it doesn't isolate completely. Not sure if they were fitted to early Aero's though. You will loose clock time and radio memory each time it's operated so should be regarded as a temporary measure. It's clearly shown in pic below at front of box.
![[Linked Image]](https://i.imgur.com/mJU3u06.jpg)
It could be that a new battery was fitted recently but due to the cars lack of use by the previous owner has quickly deteriorated, as any battery will if left flat for any length of time, due to sulphation.
Second suggest you get youself a smart battery charger such as
this inexpensive one (an essential device for any Morgan owner) and leave it connected continuously directly to battery when not in use - it will do no harm since it has a float mode.
Third investigate any current leakage from battery to car electrics/electronics whilst car not in use. A multimeter with a 10 amp range should suffice with probes inserted between battery negative post and battery negative lead. There will always be some (a few milliamps) to cover such items as clock, radio memory, keep alive parts of ECU and BCU etc. but not enough to deplete a fully charged battery such that it won't start car, over say a two week period without use.
With regard to electric windows there are a few posts on TM on this common issue.
