oximiser how looooonngggg

[ddtwelve]

had to take the battery off the bike again it wont turn the bike over but dash will work so been having to jump start run till 6mph hit first gear let clutch out and bang she comes to life again .when i came to take the batt off it was reading 11.5 volts , now its on the oximiser which when first on was all the way up to the yellow light and after a day charging now glows green , how long do i leave it charging to be sure its fulley charged