ok so i had a faulty alternator a couple month ago, i bought a reconditioned unit and its fixed the charging problem

my mum went to use my car yesterday and it just turned over slowly

i charged the battery overnight and put it on today, started first time

14.1v at the battery and increases to maybe 14.3 when rev'd

exact same at the alternator

the car dosnt get used alot so could it have just gone flat from short journeys?