3.6V SPM Backup Battery

SUNJ ENERGY provides equipment-ready lithium battery assemblies for Secure Payment Modules used in fuel dispensers. Unlike a loose replacement cell, this solution combines a SUNJ ER26500H C-size Li-SOCl₂ cell, an application-specific in-line FET switch/protection module, a red/black twisted-wire harness and a matching connector in one installation-ready assembly.

Compatibility note: This product is intended for replacement evaluation against battery assembly WU004912-0002 and related SPM keypad applications.

Why the SPM Battery Matters

The battery inside a Secure Payment Module performs a small but critical function. If it reaches end of life, the SPM may enter a security breach state, which can cause payment interruption, equipment downtime or replacement of the complete payment module. A properly matched replacement assembly allows maintenance teams to replace the battery before failure and help preserve the service life of the SPM.

Complete Battery Assembly

The proposed SUNJ configuration includes:

• ● One SUNJ ER26500H C-size Li-SOCl₂ primary cell

• ● 3.6V nominal output and 8500 mAh nominal capacity

• ● Application-specific in-line FET switch/protection module

• ● Red/black twisted-wire harness

• ● Four-position, single-row receptacle with two outer positions populated

• ● Heat-shrink insulation, mechanical retention and spot welding

• ● Custom identification label and production traceability options

Technical Specifications

Specification note: Final assembly specifications are based on an approved sample, confirmed connector pinout and application testing.

Compatible Equipment and Applications

• ● Wayne Ovation fuel dispensers

• ● Wayne Ovation 2 fuel dispensers

• ● Wayne 4/Vista fuel dispensers

• ● Secure Payment Module and SPM keypad backup power

Reference part numbers: WU004912-0002 and 310-0094

Compatibility note: Compatibility must be confirmed by equipment model, connector, pinout, polarity and electrical requirements before ordering.

Engineering Review and Customization

SUNJ ENERGY can develop replacement and custom battery assemblies for secure payment terminals, fuel dispensers, industrial keypads and other long-life electronic equipment.

• ● Cell performance matching and alternative Li-SOCl₂ cell options

• ● Connector, terminal, pinout and polarity matching

• ● Custom wire length, wire gauge and pin assignments

• ● FET switch/protection circuit integration and optional EPC/SPC pulse support

• ● Heat-shrink insulation, mechanical retention and spot welding

• ● Custom labels, part numbers, packaging, prototype production and volume manufacturing

Request a sample or engineering review: Send us your equipment model, existing battery part number, connector photos and application requirements. We will evaluate the cell, FET circuit, wiring, polarity and connector interface before preparing a sample.

Frequently Asked Questions

What is the 3.6V SPM Backup Battery used for?

It provides backup power for Secure Payment Modules and SPM keypad systems used in compatible fuel dispensers. It is supplied as a complete assembly rather than as a loose replacement cell.

Can this battery assembly replace WU004912-0002 or 310-0094?

It is intended for replacement evaluation against these reference part numbers. Equipment model, connector, pinout, polarity and electrical requirements must be verified before ordering.

Is this SPM backup battery rechargeable?

No. The ER26500H is a primary lithium thionyl chloride battery and must not be recharged.

Can the connector, wire harness and FET module be customized?

Yes. These items can be configured according to an approved sample, confirmed pinout and application requirements.

Trademark and Compatibility Notice

SUNJ ENERGY is an independent battery manufacturer and is not affiliated with or endorsed by Wayne or Dover Fueling Solutions. All third-party trademarks, equipment models and part numbers are used solely for product identification and compatibility reference.