It's worth noting that what the servo industry calls "power", knowledgeable people call "
wrong". Divide that false rating by 4 to get the theoretical maximum power of the servo, which you can use for mechanism design.
(It's false because there exists no condition
1 where a DC brush motor is simultaneously spinning at its free speed and drawing its stall current.)
1 Assuming that the motor is connected only to an electrical power source at steady state.