18650 Battery Size:

Flat top:  dia18mm * 65±1mm long

Button top: dia18mm * 67±1mm long

 

26650 Battery  Size:dia26mm * 65±1mm long

21700 Battery Size:dia21mm * 70±1mm long

20700 Battery Size:dia20mm * 70±1mm long

18500 Battery Size:dia18mm * 50±1mm long

14500 Battery Size:dia14mm * 50±1mm long

16340 Battery Size:dia16mm * 35±1mm long