Comment from: roger

Although there are many different types of batteries most go through at least two phases. 1 a main charge and 2 a maintenance charge.
In the case of lead acid batteries there is commonly a three phase charge with the odd extra option.
The first stage is Bulk followed by Absorption and then Float
Other options are Equalisation and Maintenance
Rolls provides a table which is consistent with the average Lead/Acid generic battery that is infrequently used for a backup. Though precautions should be made for stratification and other capacity limiters
The one specifically for the Series 4000 that undergoes regular loading is much higher. This is the table I base my charging parameters on.
When using automatic temperature compensation Rolls recommends a 5mv adjustment for every degree Celsius from 25 per cell. That's 30mv for a 12v battery
For a six cell battery series 4000 battery that's in regular use the recommended charge voltage is 15v So @ 15 degrees Celsius that's 15 + 0.3v. This is for battery temperature not room or ambient temp.