SIMATIC S7 Backup Battery SIMATIC S7 Backup Battery is used with S7-300 series and S5-90U series CPUs.Features & Benefits Lithium battery Rechargeable 3.6 V/min 0.85 AhSiemens S5-90/95/100U The following products are from an earlier generations of Siemens PLCs and should be ordered for repair and maintenance purposes only. They will be discontinued when current stocks are exhausted. For new projects and applications, please choose from later generations of PLCs such as the Siemens S7-200/300 range