Keystone coil vs leaf spring SMT AA battery holders
I would suggest you keep use the leaf-spring version, or choose the version which spring shape like a trangle, and bent a bar at center of the touch end.



the problem is the straight coil spring at same diameter is easy to tilt, i had some trouble years ago one of the spring coil end touched the slot between the negative and positive of battery and shorted it. i forgot which type of battery i use(this wolden't happen for good protected battery.)

the leaf-spring and trangle coil spring will always keep touch the center