Saft LS14250 Lithium Battery – Critical Spare for Industrial & Legacy Automation Systems

Technical Dossier

Product Details And Specifications

Saft LS14250 Lithium Battery – Critical Spare for Industrial & Legacy Automation Systems

When a PLC loses its memory backup battery, the consequences extend far beyond a simple component swap. In legacy automation environments — where the control program, calibration data, and process parameters are stored in battery-backed SRAM — a failed LS14250 can trigger an unplanned line shutdown, force a full system re-commissioning, and in worst cases, expose the facility to the cost of replacing an entire controller platform that has long since been discontinued by its OEM. For plants running Siemens S5, Allen-Bradley SLC 500, Mitsubishi MELSEC A-series, Yokogawa CENTUM, or similar legacy DCS/PLC architectures, sourcing a verified LS14250 is not a procurement exercise — it is an asset protection decision.

DriveKNMS maintains verified stock of the Saft LS14250 specifically to serve facilities that cannot afford the risk of an unplanned outage caused by a depleted backup cell.

Technical Specifications

Solving the Critical Backup Battery Supply Problem

The LS14250 is the de facto standard backup cell across a broad range of industrial control hardware. Its 3.6 V lithium thionyl chloride chemistry delivers a flat discharge curve and an exceptionally low self-discharge rate, making it the only viable choice for applications where the battery may sit in standby for 5–10 years between replacements. No alkaline or NiMH alternative can replicate this performance profile in a memory-backup role.

The supply risk is structural, not temporary. Saft's LS14250 is manufactured in France and distributed through a tiered industrial supply chain. During periods of logistics disruption, allocation constraints, or regional distributor stockouts, facilities that have not pre-positioned inventory face lead times measured in weeks — not days. A PLC that loses its program data while waiting for a battery is a production asset that has effectively failed.

For plant engineering and maintenance teams managing aging automation infrastructure, the LS14250 is not a commodity item. It is the single lowest-cost intervention available to protect a controller that may cost tens of thousands of dollars to replace — and whose replacement may require months of re-engineering if the original platform is no longer supported by the OEM.

Extending Asset Life by 5–10 Years Through Proactive Battery Management: The most cost-effective maintenance strategy for legacy PLC and DCS installations is a scheduled battery replacement program. Replacing the LS14250 on a fixed cycle — typically every 3–5 years depending on operating temperature — eliminates the risk of unplanned memory loss entirely. Facilities that implement this protocol routinely extend the operational life of their legacy controllers by a full decade, deferring capital expenditure on system upgrades that can run into seven figures when engineering, commissioning, and production downtime are factored in. The cost of a replacement LS14250 is negligible against this backdrop. The cost of not having one in stock when it is needed is not.

Condition & Reliability Assurance

Every LS14250 unit supplied by DriveKNMS passes a structured 5-step verification process before dispatch:

• Step 1 – Open Circuit Voltage Check: Each cell is measured against the Saft factory specification. Cells showing voltage depression indicative of partial discharge or internal leakage are rejected.
• Step 2 – Date Code Verification: Manufacturing date codes are inspected. Units outside acceptable shelf-life windows are not offered for sale.
• Step 3 – Seal and Casing Inspection: Physical inspection for electrolyte leakage, terminal corrosion, and casing deformation. Lithium thionyl chloride cells that have leaked are a safety hazard and are unconditionally rejected.
• Step 4 – Storage Condition Audit: Stock is held in temperature-controlled, humidity-monitored storage consistent with Saft's long-term storage recommendations.
• Step 5 – Packaging Integrity Check: Units are dispatched in original or equivalent protective packaging compliant with IATA/IMDG regulations for lithium primary cells.

Key Features for System Maintenance

• Drop-in replacement: The LS14250 is a standardized 1/2 AA form factor. Replacement requires no modification to the host controller, no firmware changes, and no re-commissioning of the control program — provided the replacement is performed before the existing cell is fully depleted.
• No re-programming required: In a correctly executed hot-swap or scheduled replacement procedure, the controller retains its program and configuration data throughout the battery change. This eliminates the engineering labor cost associated with program reload and re-validation.
• Avoids system re-engineering: The alternative to maintaining a stock of LS14250 cells is accepting the risk of a controller memory loss event. Recovery from such an event — particularly on a legacy platform where the original engineering documentation may be incomplete — can require significant engineering resources and extended downtime.
• Long shelf life: With a self-discharge rate below 1% per year, LS14250 cells can be held in inventory for extended periods without meaningful capacity loss, making them suitable for strategic sparing programs.

FAQ

Q: What warranty applies to LS14250 cells supplied by DriveKNMS?
A: We provide a 12-month warranty against manufacturing defects and premature capacity loss under normal storage and operating conditions. Warranty claims require return of the suspect unit for inspection.

Q: Are the units new or refurbished?
A: The LS14250 is a primary (non-rechargeable) lithium cell. We supply new, unused units only. Refurbishment is not applicable to primary lithium chemistry.

Q: Can I order in bulk for a strategic sparing program?
A: Yes. We recommend that facilities operating multiple legacy PLC or DCS installations maintain a minimum of 2–3 cells per controller as a strategic reserve. Contact us to discuss volume pricing and long-term supply agreements.

Q: How should LS14250 cells be stored?
A: Store at 15–25°C in a dry environment away from direct sunlight and conductive materials. Do not store in the same location as flammable materials. Follow local regulations for lithium primary cell storage.

Q: What is the lead time?
A: Subject to current stock levels. Contact us to confirm availability before placing a critical order.