Product Analysis: 6ES7900-0AA00-0XA0
The Siemens 6ES7900-0AA00-0XA0 is a **Backup Battery (Lithium)** specifically designed for SIMATIC S7-300 and S7-400 PLC CPUs. It preserves the RAM program data and the internal clock in the event of a power failure.
Critical Spare Part
- Type: Lithium (Li).
- Voltage: 3.6 V.
- Size: 1/2 AA (Cylindrical).
- Usage: CPU Backup.
Why Replace It?
If the «BATTF» LED lights up on your CPU, this battery must be replaced immediately. Failure to do so will result in the loss of the PLC program when the machine is switched off, leading to costly downtime. We recommend keeping a fresh **6ES7900-0AA00-0XA0** in stock at all times.
