Siemens Batteries 6ES7971-0BA00

Siemens 6ES7971-0BA00 is a 3.6 V/2.3 Ah lithium back-up battery specifically designed for the power supply units (PS) of the SIMATIC S7-400 programmable logic controllers (PLC). 

Specification:

• Main Function: This battery serves as a backup power source to maintain data integrity and the system time in the SIMATIC S7-400 PLC in the event of a power failure or when the main power supply is switched off. This prevents data loss and eliminates the need to reconfigure the PLC, thus minimizing downtime.
• Compatibility: It is intended for use with Siemens Power Supply units PS 405 (4A, 10A, and 20A) and PS 407 (4A, 10A, and 20A) within the S7-400 series.
• Technical Specifications:
  • Voltage: 3.6 V.
  • Capacity: 2.3 Ah (ampere-hours) (some equivalent replacements may offer 2400mAh or 2.6Ah).
  • Chemistry: Lithium Thionyl Chloride.
  • Size: Approximately AA size (0.57″ dia. x 1.98″ tall).
  • Weight: Approx. 25 g.