SIMATIC S5, PUFFERBATTERIELITHIUM, SIZE AA, 3,6V/1,75AHF. S5-101U, -101R, S5-115U/H/F,CP 516, OP 396SIMATIC S5, BACKUP BATTERYLITHIUM, SIZE AA, 3.6V/1.75AHF. S5-101U, -101R, S5-115U/H/F,CP 516, OP 396