High-Reliability Downhole Power for Critical Oil & Gas Operations

Battery packs manufactured by Excell Battery are engineered specifically to withstand and perform reliably in the world’s most aggressive downhole drilling environments. Operating miles beneath the surface, Measurement-While-Drilling (MWD) and Logging-While-Drilling (LWD) tool strings require power solutions that resist intense thermal stress, persistent vibration, and severe shock loads.

Excell Battery’s downhole battery systems incorporate premium cells sourced from globally leading manufacturers of high-temperature Lithium Thionyl Chloride (Li-SOCl2) technology. With over 40 years of specialized assembly and packaging expertise, our custom-designed packs deliver uninterrupted power to preserve valuable drilling data and ensure maximum downhole operational uptime.

Premium Cell Sourcing

Built with top-tier Lithium Thionyl Chloride cells rated for temperatures up to 165°C.

Extreme Shock & Vibration Resistance

Advanced potted encapsulants, reinforced welds, and shock-mitigating pack designs.

Integrated Criterion® Monitoring

Real-time telemetry recording voltage, temperature, vibration, rotation, and stick-slip events.

UN 38.3 Certified Safety

Fully compliant with international hazmat transportation and environmental testing standards.

Key Engineering & Manufacturing Standards

Downhole battery failure results in costly non-productive time (NPT) for oilfield service operators. To guarantee total reliability under extreme borehole pressures and thermal cycles, every downhole pack engineered by Excell Battery adheres to strict manufacturing protocol:

  • High-Temperature Chemistries: Specially formulated Lithium Thionyl Chloride (Li-SOCl2) cells optimized for steady voltage discharge up to 165°C.
  • Precision Resistance Welding: Rigorously controlled internal interconnect welds and solid nickel busbars to prevent mechanical fatigue.
  • High-Spec Material Selection: High-grade encapsulants, high-temperature heat shrink tubing, specialized potting epoxies, and rugged housing sleeves.
  • 100% Brand-New Components: Built exclusively with fresh, fully traceable factory cells and new hardware for zero risk of capacity fading.
  • UN Manual of Tests and Criteria: Tested and certified to UN 38.3 standards for safe global logistics and air transport compliance.

Criterion® Advanced Downhole Smart Monitoring Technology

The Criterion® CR4 gauge represents the next generation of intelligent downhole battery telemetry. Integrated directly into the battery pack, the CR4 system records precise operational data, enabling oilfield engineers to verify tool performance and diagnose borehole dynamics in real time.

Accurate Remaining Capacity Tracking
Real-Time Downhole Temp & Voltage
3-Axis Shock & Vibration Logging
Stick-Slip & Tool Rotation Telemetry

Standard Downhole Battery Specifications

Excell Battery supplies standard and customized battery configurations compatible with major MWD/LWD drilling tool platforms worldwide.

Part Number Description Cell Type Max Temp OCV Capacity Dimensions
2EXL10518CR4 APS 10-Cell Battery with CR4 DDHR 150°C 36V 28 Ah 1.46" x 57.4"
2EXL10404PLM Applied Physics 8-Cell Battery with CR4 DDMR 165°C 29V 29 Ah 1.46" x 46.6"
2EXL10000CR4 Bluestar 8-Cell Battery with CR4 DDMR 165°C 29V 29 Ah 1.485" x 46.75"
2EXL4910T EvoOne 10-Cell Battery with CR4 FatD 150°C 36V 29 Ah 2.096" x 37.724"
2EXL4601EX Extreme Engineering 8-Cell Battery DDMR 165°C 29V 29 Ah 1.43" x 44.8"
2EXL10073CR4 Tensor 8-Cell Battery with CR4 DDMR 165°C 29V 29 Ah 1.485" x 46.6"

* Note: All standard downhole battery models can be customized for specific temperature envelopes, voltage outputs, and customized wiring harnesses upon request.

ISO 9001 Certified Manufacturing & Global Supply Chain Resilience

Excell Battery operates state-of-the-art manufacturing facilities in North America, fully supported by our parent organization, Ultralife Corporation. Our long-term direct partnerships with premium cell providers ensure stable component availability, rapid turnaround times, and uncompromised quality assurance for global oilfield buyers.

Request Technical Specifications or Custom Quotation

Our experienced downhole engineering team is available to assist with custom pack design, technical datasheets, and OEM bulk procurement for global oil & gas projects.