There may be three lines on the cell tube of your Samsung 18650:

Line 1 : INR18650-25R --- cell model name
Line 2 : SAMSUNG SDI --- cell manufacturer
Line 3 : 125 --- part number of 25R

Line 1 : B0BB --- 1st digit: Line number ( “1” for cylindrical line No.1, “B” for cylindrical line No. 4)
2nd digit: Final number of Model Name (“0” is INR18650-25x)
3rd digit: Year ( “B” is 2011)
4th digit: Month ( “9” is Sep. ; A is Oct., B is Nov., C is Dec)

Line 2 : 7B111 --- 1st digit: Negative coater number ( “7” is No. 7 coater)
2nd ~ 4th digit: Batch number
5th digit: Serial No. of assembling

Line 3 : E9 --- 1st digit: Reel No ( “E” is E reel ; A is A reel, B is B reel, ... F is F reel)2
nd digit: Winding Machine No. ( “9” is No. 9 winder)