---
title: ER Cells | Ultralife Corporation
description: ULTRALIFE’s non-rechargeable batteries offer industry-leading performance, from ultra-thin to high-capacity cells—built for extreme conditions and long-term reliability.
---

![ultralife-logo-transparent](https://info.ultralifecorporation.com/hs-fs/hubfs/ultralife-logo-transparent.png?width=308&height=50&name=ultralife-logo-transparent.png "ultralife-logo-transparent")

# ER Cylindrical (Li/SOCl₂) Batteries

![ER-Cylindrical](https://info.ultralifecorporation.com/hs-fs/hubfs/ER-Cylindrical.png?width=236&height=150&name=ER-Cylindrical.png "ER-Cylindrical")

When performance matters, Ultralife’s ER Cylindrical Lithium Thionyl Chloride (Li/SOCl₂) cells deliver. Whether your priority is **maximum capacity** or **high power output**, our ER series offers flexible, high-density solutions tailored for mission-critical applications.

[Speak With An Engineer](https://info.ultralifecorporation.com/er-cells#form)

## Built by Engineers, For Engineers

![industries-served](https://info.ultralifecorporation.com/hs-fs/hubfs/industries-served.png?width=427&height=125&name=industries-served.png "industries-served")

At Ultralife, we specialize in custom and standard battery packs designed to meet your unique needs. Our strength lies in deep technical expertise, collaborative problem solving, and our ability to deliver application-specific energy solutions—no matter the complexity. 

## Why Choose ER Cylindrical Cells?

## Ultralife’s ER Cylindrical cells are built for performance in the harshest conditions, offering industry-leading reliability and power consistency. Whether you need immediate stock or scalable production, our solutions are ready to meet your critical energy demands with speed and confidence.

- Up to 30% More Capacity
- Ultra-High Energy Density
- Wide Temperature Range

- Non-Flammable Electrolyte for Enhanced Safety
- Off-the-Shelf Availability
- Short Lead Times

## ER Cell Product Families

## Ultralife’s ER Generation X cells deliver up to 30% more capacity and 400 Wh/Kg energy density in compact bobbin or spiral designs—ideal for metering, communications, security systems, and more, with built-in safety and certified reliability.

#### **ER Generation X**

- High and stable operating voltage
- Superior current capabilities
- Low self-discharge rate

![ER-Generation-X](https://info.ultralifecorporation.com/hubfs/ER-Generation-X.jpg "ER-Generation-X")

[Learn More](https://ecommerce.ultralifecorporation.com/ECommerce/category/battery-energy/non-rechargeable-cells/er-cylindrical-li-socl2/er-generation-x)

**ER Generation X2**

- Designed for gas metering and hazardous environments
- Includes safety venting for added protection

![ER-Generation-X2](https://info.ultralifecorporation.com/hubfs/ER-Generation-X2.jpg "ER-Generation-X2")

[Learn More](https://ecommerce.ultralifecorporation.com/ECommerce/category/battery-energy/non-rechargeable-cells/er-cylindrical-li-socl2/er-generation-x2)

### When Failure Isn’t an Option, Bring in the Experts

Mission-critical ER cell systems demand more than just battery expertise. From long-life design optimization to system integration and scalable manufacturing, we engineer solutions built for reliability in the world’s most demanding applications.

Ready to Find the Right Power Solution for Your Application? Our Experts Are Here to Help.

[Speak With An Engineer](https://info.ultralifecorporation.com/er-cells#form)

## Speak With Our Applications Engineers Today

Complete the form below to connect with our engineering team. We’ll help you find the ideal ER solution for your application.

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North America Phone:  [+1 (315) 332-7100](tel:315-332-7100)  |  UK/Europe Phone:  [+44 1782 566 688](tel:441782566688)  
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