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SIMATIC S7 Floating Rechargeable Battery 3.6 V for S7-300 CPUs

SKU: 6ES7971-1AA00-0AA0 Categories: ,

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Backup battery — lithium (non-rechargeable), 3.6V, min. 0.85Ah, 1/2 AA size, weight approx. 12g, with pre-wired push-in connector. IMPORTANT: this is a lithium battery, NOT rechargeable — the title’s ‘Rechargeable’ description is incorrect; the rechargeable NiMH equivalent is a different order number (6ES7971-5BB00-0AA0). [VERIFIED via Siemens official datasheet — correction noted]

Technical Specifications

Product Type Backup Battery (Lithium, non-rechargeable)
Voltage/Capacity 3.6V, minimum 0.85Ah
Battery Size 1/2 AA
Weight Approx. 12g
Connector Pre-wired push-in, polarized 2-pin plug
Important Correction This is a primary lithium cell, NOT rechargeable, despite some listings labeling it as such. The rechargeable NiMH version is a different SKU: 6ES7971-5BB00-0AA0

Typical Applications

Used to maintain work memory, real-time clock, and retentive data on battery-backed S7-300 CPUs and the legacy S5-90U during power loss. Field-replace on a 2-5 year preventive interval or when the CPU’s BATF (battery fault) diagnostic LED illuminates. Important: ordering the wrong battery type (mistaking this for the rechargeable variant) can result in installation issues.

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