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Cylindrical A-size 3.6V 3.0Ah primary lithium battery

Ultralife Corporation

Ultralife ER18505M A 3.6V 3.0Ah Primary Lithium Battery

SKU CH-N471-MA97R

3.6 V primary lithium cell delivers 3.0 Ah capacity with high drain capability and under 1 % self-discharge after one year at 20 °C for 10-year service life

  • Battery pack size1-pack
  • Battery typeLithium
  • 6 V nominal voltage powers demanding devices
  • 0 Ah capacity delivers extended runtime
  • High and flat operating voltage maintains steady output
  • Low self-discharge under 1 % per year at 20 °C
  • Service life exceeds 10 years in typical applications

Ultralife ER18505M Primary Lithium Cell

The Ultralife ER18505M is a 3.6V primary lithium battery with a 3.0Ah nominal capacity. It is built as an A-size spiral cell for devices that require a single, non-rechargeable power source with stable voltage output.

Capacity and operating headroom

The cell delivers high and flat operating voltage across its service life. Low self-discharge of less than 1% after one year at 20°C preserves capacity during storage, while high drain capability supports higher power applications until the 3.0Ah rating is depleted.

Upgrade context and fit

This battery replaces older primary cells in equipment needing long-term, maintenance-free energy. The jump is worthwhile when a design demands a battery life higher than 10 years and consistent high power delivery that standard chemistries cannot sustain.

How it compares

Measured against everything we stock in Household Batteries & Chargers, at today’s prices. Recalculated every night.

Price $1.99
Cheaper than about 99% of the 10,440 comparable items (median $10.99).

Specifications

Power
Battery typeLithium
In the box
Battery pack size1-pack

Questions about this item

Will the 3.6 V nominal voltage of the ER18505M work with legacy 3.6 V lithium-thionyl chloride devices?

Yes, the cell delivers a steady 3.6 V nominal output that matches existing 3.6 V lithium-thionyl chloride equipment.

How can I verify the ER18505M is performing correctly after installation?

Measure the open-circuit voltage; a fresh cell should read approximately 3.6 V, and under load the voltage should remain flat throughout discharge.

What is included in the 1-pack and do I need a separate holder?

The pack contains one ER18505M spiral cell; a compatible battery holder or PCB contacts must be sourced separately.

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