Siemens 6ES7971-0BA00 SIMATIC S7-400 Backup Battery | Replacement, Equivalent & Selection Guide
Technical Specifications
- Part Number: 6ES7971-0BA00
- Manufacturer: Siemens AG
- Product Family: SIMATIC S7-400
- Description: Backup Battery for CPU / Memory Modules
- Battery Type: Lithium (Li-MnO₂)
- Nominal Voltage: 3.6 V DC
- Capacity: Approx. 1,000 mAh
- Operating Temperature: 0 °C to +60 °C
- Storage Temperature: -20 °C to +60 °C
- Dimensions: AA-size (14.5 mm × 50.5 mm)
- Weight: Approx. 15 g
- Shelf Life: Up to 10 years (sealed)
- Compliance: CE, RoHS
- HS Code: 8507.60
Compatible Replacement & Equivalent Models
The following batteries are confirmed compatible replacements or functional equivalents for the 6ES7971-0BA00:
- 6ES7971-0BA00 — Original Siemens (this listing)
- 6ES7971-0BA10 — Siemens updated revision (direct drop-in)
- ER14505 / LS14500 — Generic 3.6V AA lithium (SAFT, Tadiran, Xeno)
- SAFT LS 14500 — Industrial-grade equivalent, widely used in S7-400 CPUs
- Tadiran TL-5903 — High-temperature variant, suitable for harsh environments
- Xeno XL-060F — 3.6V AA lithium, compatible form factor
Note: Always verify connector type and polarity before installation. Third-party batteries must meet 3.6V / ≥1,000 mAh specifications.
Why Choose the Original 6ES7971-0BA00
- Factory-tested and certified by Siemens for SIMATIC S7-400 platforms
- Guaranteed compatibility with all S7-400 CPU variants (CPU 412, 414, 416, 417)
- Consistent voltage output ensures reliable RAM and clock data retention
- Traceable batch quality control — no counterfeit risk
- Backed by Siemens global warranty and technical support
Typical Applications
- Retaining SRAM program data during power outages in S7-400 CPUs
- Real-time clock (RTC) backup for time-stamped process logging
- Replacement maintenance in automotive, chemical, and energy plant PLCs
- Spare-parts inventory for SIMATIC S7-400 control cabinets
- Factory automation lines requiring uninterrupted PLC memory retention
System Compatibility
- Siemens SIMATIC S7-400 — CPU 412-1, 412-2, 414-2, 414-3, 416-2, 416-3, 417-4
- S7-400H (High-Availability) redundant CPU modules
- S7-400 IM (Interface Modules) with battery backup slots
- Compatible with PS 405 and PS 407 power supply units
- Not compatible with S7-300, S7-1200, or S7-1500 series (different battery form factor)
Selection Guide
| Requirement | Recommended Model | Reason |
|---|---|---|
| Standard S7-400 CPU replacement | 6ES7971-0BA00 / 0BA10 | OEM certified, plug-and-play |
| Budget-conscious maintenance | SAFT LS 14500 | Industrial grade, lower cost |
| High-temperature environment (>50 °C) | Tadiran TL-5903 | Extended temp range up to 85 °C |
| Long shelf-life spare stock | Xeno XL-060F | 15-year shelf life, hermetic seal |
| Bulk procurement / OEM | Contact Konmask.com | Volume pricing available |
Quality Assurance & Sourcing
- All units sourced from authorized Siemens distributors or verified industrial surplus channels
- Each battery inspected for voltage output (≥3.5V at dispatch) and physical integrity
- Anti-static, moisture-proof packaging for safe international shipping
- Batch traceability records maintained for B2B procurement compliance
- Certificate of Conformity (CoC) available upon request
How to Order
- Confirm your CPU model number (e.g., 6ES7416-2XN05-0AB0) to verify battery slot compatibility
- Select quantity — single unit or bulk pack
- Add to cart and proceed to checkout, or contact us for a formal quotation (RFQ)
- For urgent orders, email support@konmask.com with your PO number
Replacement & Compatibility FAQ
Q: Can I use a generic 3.6V AA lithium battery instead of 6ES7971-0BA00?
A: Yes, provided it meets 3.6V nominal voltage and ≥1,000 mAh capacity. Ensure the connector matches your CPU’s battery holder. Industrial-grade cells (SAFT, Tadiran) are strongly recommended over consumer-grade alternatives.
Q: How often should I replace the S7-400 backup battery?
A: Siemens recommends replacement every 1–2 years under normal operating conditions, or when the CPU’s battery low indicator (BF LED) activates.
Q: Is the 6ES7971-0BA10 a direct replacement for 6ES7971-0BA00?
A: Yes. The 0BA10 is the current production revision and is fully backward-compatible with all S7-400 CPUs that accept the 0BA00.
Q: Will replacing the battery erase my PLC program?
A: If the CPU is powered ON during battery replacement (hot-swap), program data is retained in SRAM. If powered OFF, load memory (Flash/EPROM) retains the program, but SRAM data (retentive data) may be lost. Always follow Siemens replacement procedures.
Q: Do you provide bulk pricing for maintenance contracts?
A: Yes. Contact us at support@konmask.com for volume discounts and annual supply agreements.
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