6ES7971-0BA00 Siemens Battery for use with PS 405/PS 407 Power Supply

Siemens Backup Battery For Use With PS 405/PS 407, 3.6V Voltage Rating, 25g Weight - S7 Series - 6ES7971-0BA00_x000D_ Use this backup battery from Siemens to prevent data loss on communication modules due to power cuts. It's designed for use with I/O modules in the TIM series and it keeps your CPU running to preserve critical programming data during maintenance or an outage. This eliminates the need to reconfigure the PLC, preventing downtime and increasing productivity. With a capacity of 2.3Ah, you can use this battery to keep small CPUs running long enough to back up data properly before shutting down. It has a voltage rating of 3.6V, so it's a practical choice for low-voltage systems._x000D_ • Light weight of 25g for minimal strain_x000D_ • Simple, tool-free installation saves time and effort_x000D_ • Lithium battery offers high energy density for long-term performance_x000D_ Is this battery waterproof?_x000D_ No, this battery isn't waterproof, so it's not suitable for moist working areas._x000D_ How do I detect the positive and negative terminals on this battery?_x000D_ The positive and negative terminals of this battery are labelled on its body for quick identification.