Okay guys , here`s where I am with my electrics plus another newbie question .

I have removed the red wire so my lipo runs the motor and the NiMh runs my 3 servos which is monitored by a voltwatch2 .
My question now is , which battery will run out the quickest or do I have to do fly-bys and check the voltwatch to see ifl the NimH battery is still within its saftey zone.
This is my first plane so I know nothing .

Kind Regards.