Closing recent apps do effect on battery?

I’ve heard something about closing recent apps.”That is closing recent apps is not good.It can make battery life short because after you closed some apps, and you use this again device have to run this app from the first again.So battery life cannot be longer.”

That is what I’ve heard and

1.I wanna know is that true?

2.Shouldn’t I close recent apps?

3.if it is not true, even after I’ve turned off background refresh app,do I still need to close recent apps?