Custom Lithium Ion Batteries
Custom lithium-ion batteries are designed to meet the specific power, size, and safety needs in advanced electronic systems. EI Sales connects OEMs and engineers to trusted battery manufacturing partners through early collaboration and technical insight.
High-Performance Power for Critical Systems
Custom lithium-ion batteries support applications where output stability, size constraints, and operating life all matter. We collaborate closely with OEM engineering teams to specify battery solutions that meet demanding load profiles and duty cycles in real-world environments.
These batteries are used in systems that demand continuous uptime, mobile operation, or precise control. From surgical instruments and test equipment to smart sensors and mobile diagnostics, uninterrupted performance is often a design requirement. We help match each project to a pack that meets electrical performance needs without compromising integration or serviceability.
In high-dependency environments, design teams benefit from early battery planning. That approach helps avoid electrical mismatches, mechanical conflicts, and last-minute delays during regulatory review or pilot production.

Custom Configurations and Form Factors
Battery-powered systems often face tight mechanical and electrical limits. EI Sales works closely with engineers to define the right cell configuration, connector style, and protection features that align with those limits. Packs can be arranged in series, parallel, or mixed layouts to meet voltage and capacity targets, even in irregular or asymmetric housing designs.
Flat packs, cylindrical cells, and enclosed modules are all supported. Packs can be tailored to fit within unique footprints, match enclosure contours, or satisfy specific mounting requirements. Our team collaborates early in the design process to align performance targets and physical constraints, reducing the chance of late-stage revisions. Battery prototypes can also be developed quickly to verify electrical characteristics or thermal performance before full-scale production begins.
Designed for Safety and Longevity
In regulated and high-reliability environments, battery safety and long service life are of utmost importance. Our team helps OEMs specify lithium-ion solutions that include protection circuitry, temperature monitoring, and smart charging controls.
Integrated battery management systems (BMS) and redundant safeguards can be incorporated into each design to monitor cell performance, manage current flow, and track diagnostic data. These measures reduce the risk of failure and simplify downstream service or replacement.
Each battery pack is designed with durability goals in mind, including cycle life, thermal tolerance, and resistance to vibration or shock. We work closely with design teams to meet performance benchmarks and limit risk across the entire product lifecycle.
Compliance Support for Global Markets
Custom batteries often need to meet multiple regulatory requirements. EI Sales helps navigate design considerations tied to UN38.3, IEC 62133, UL certifications, and shipping regulations for lithium-ion technologies.
Our team coordinates directly with engineering and quality departments to align battery designs with documentation, safety validation, and proper labeling. Lab scheduling and certification testing can also be managed to avoid delays.
These services help speed up approval cycles for medical, industrial, and aerospace programs. We work as a partner throughout the process, starting at prototype review and continuing through final qualification, so your power system meets technical and compliance goals without unexpected setbacks.
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