Don't forget to heatsink it.
Also note you won't be able to get more than ~12V out of the regulator with a 14.8V supply. If you just want to drop around a volt (i.e. get ~13.8V) then you could use two diodes in series on the output. A silicon diode has a voltage drop of about 0.6V so that would drop 1.2V giving you 13.6-13.7V. You'll need to chose diodes with suitable current handling capabilities - 5A or better.