Golf clubs and golf club heads

A golf bag comprising:

• a golf bag base;
• a first power source, connected to a first induction coil;
• a pocket on an exterior of the golf bag with a second induction coil positioned beneath a wall of the pocket;
• a container attached to the golf bag base wherein the container is configured to retain a golf club;
• wherein a first electrical current is configured to flow in the first induction coil to charge a second power source of a monitoring device through a third induction coil;
• and
• wherein a second electrical current is configured to flow in the second induction coil to charge a third power source.

A golf bag comprising:

• a golf bag base having a first induction coil configured to operably engage with a first power source;
• a container attached to the golf bag base, the container configured to engage a golf club;
• and
• wherein when a grip end of the golf club is inserted into the container, a first electrical current may flow in the first induction coil and induce a second electrical current into a second induction coil to charge a second power source within a monitoring device engaged with the grip end of the golf club.