Ultralife High Power Lithium Battery UHR-ER34615-H 3,6V 14,5Ah (D-Cell Spiral Cell)

The Ultralife UHR-ER34615-H is an extremely powerful primary lithium battery (lithium thionyl chloride / Li-SOCl2) in the standard size D (mono). In contrast to conventional "energy" cells (bobbin type), this model features a spiral construction (spiral cell). This special construction enormously increases the internal surface area of the electrodes, enabling the battery to deliver very high continuous currents and strong pulses. It is therefore the first choice for applications requiring short, high power peaks, such as radio transmitters, military equipment, or motor-operated valves.

Highlights at a glance

• Spiral Cell Technology: The wound electrode structure enables extremely high discharge currents (up to 2000 mA continuous), where standard lithium cells often fail at just a few mA.
• High capacity: Despite its performance-centric construction, it offers an impressive capacity of 14.5 Ah for long runtimes.
• Enormous pulse power: Delivers pulse currents up to 3000 mA (occasionally 4000 mA), ideal for GSM modules, alarm sirens, or pump motors.
• Extreme temperature range: Operates reliably from arctic -55 °C to hot +85 °C.
• Long shelf life: Thanks to the low self-discharge (< 2 % per year), the battery can be stored for 10 years and longer.
• Safety features: Equipped with a PTC (thermistor) for current limitation in short circuit conditions, as well as a safety valve and hermetic glass-to-metal seal.

The power station for industry & military

Whereas standard lithium D cells (bobbin type) are often only intended for memory backup or extremely low currents, the UHR-ER34615-H is a real workhorse. It is often used in GPS tracking systems, oceanographic buoys, military radios, smart meters with remote transmission, and medical devices (e.g. defibrillators, infusion pumps). It combines the longevity of lithium with the power of a high-current battery.
 

Features

FAQs for Ultralife UHR-ER34615-H

What is the difference to the UHE-ER34615?

This is the crucial difference!

• UHE-ER34615 (Energy / Bobbin): Has more capacity (19 Ah), but delivers only very little current (max. approx. 100-200 mA). Ideal for long-term applications with minimal consumption.
• UHR-ER34615 (Power / Spiral): Has slightly less capacity (14.5 Ah), but delivers an extremely high current (max. 2000-3000 mA). If your device moves motors or transmits (GSM/LTE), you absolutely need the UHR version (spiral). The UHE version would immediately collapse in voltage.

Is this battery rechargeable?

No. This is a primary lithium battery. Never attempt to charge this battery. There is an explosion hazard. Because of the high energy density, it should also not be forcibly opened or burned.

Do I need a protection resistor?

The battery already includes an internal PTC (Positive Temperature Coefficient), which acts as a reversible fuse. In the event of an external short circuit, the PTC increases its resistance and limits the current to prevent overheating. Nevertheless, appropriate fusing should be included in the circuit, since the battery can release very large amounts of energy.

Why does it have 3.6V and not 1.5V?

This is a lithium industrial battery, not a normal alkaline battery. It has a nominal voltage of 3.6 volts (instead of 1.5 V). It must never under any circumstances be inserted into regular devices (such as torches or radios) that are designed for 1.5V batteries, as the double voltage would immediately destroy the electronics.