1450mah will be plenty for and hour main...I used to run a 1500 nimh back in the day with a pair of digital savox in truggy with zero issues....as long as you are running good quality servos that are digital coreless or brushless as they will run with less draw...old analog ones will struggle.....
it all depends what servos your powering. Different ones draw different Amount of power. I remember drake with the hitec servos he used they kinda like recharged the battery as he used them or didn’t draw much current.