Nope, that disables hibernation... We are talking about draining the battery while sleeping.
And also, disabling hibernation doesn't help a dime about battery life. Hibernation is just as battery friendly as turning it off completely. That's what it is - it saves RAM contents to the hard drive and turns itself off. There is a reason why computers hibernate automatically before the battery dies - it consumes exactly zero energy but lets you continue your work once you recharge the battery.
Anyway, if we're talking about sleep, I don't want to completely disable it, I just want it to behave like it did with older processors: don't keep the tablet online, just give some power to the RAM