The battery is held in with a nice clip on the bottom of the unit. Very nice build quality.
You'd be forgiven for thinking that the belt clip might interfere with the removal of the battery. But it doesn't.
The belt clip lifts out of the way with your fingers, and the battery pulls out easily once the clip is unsnapped.
If you're careless, then you can let the belt clip slide out from your grip and it will snap against the metal chassis of the radio (exposed when the battery is removed), but overall there's no problem.