Ideal diode MOSFET circuit

Having read A simple and inexpensive ideal-diode MOSFET circuit @ Power Electronic Tips, decided to draw its N-channel counterpart. See images below for comparison. Since I have no formal electronics education, this is to ask the experts if this is right and what are its practical limitations:

Speaking of low nominal voltage cells I guess a low VGS MOSFET is preferred if used to prevent battery or charger reverse current, isn't it?