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Ultralife Corporation
Ultralife ER18505 3.6V 4.0Ah Lithium Battery
A 3.6V 4.0Ah primary lithium cell with hermetic sealing, low self-discharge and a life exceeding 10 years
- TypeBatteries
- Battery Pack1-pack
- 6 V nominal voltage delivers stable power
- 0 Ah capacity supports high-energy applications
- Low self-discharge under 1 % per year at 20 °C retains charge
- Hermetic glass-to-metal seal prevents leakage for 10+ year life
- Non-flammable electrolyte improves safety under abuse
Primary lithium cell for long-life devices
The Ultralife ER18505 is a 3.6V primary lithium cell rated at 4.0Ah nominal capacity. It is designed for equipment that demands stable voltage and high energy density over an extended service life. Typical uses include utility metering, remote sensors, security systems and industrial data loggers where battery replacement is difficult or costly.
Hermetic glass-to-metal seal prevents leakage
The cell uses a hermetic glass-to-metal seal and a non-flammable electrolyte to eliminate leakage risk and improve safety under abuse conditions. Self-discharge is less than 1% per year at 20°C, supporting a shelf and operational life exceeding 10 years depending on the application. The cylindrical form factor fits standard holders for this size class.
Replaces older primary cells in high-drain roles
This cell replaces earlier primary lithium types such as LS17500, XL-100F and ER17/50 where higher drain capability and longer calendar life are required. The upgrade is worthwhile when existing packs show premature voltage drop or leakage, or when maintenance intervals need extending beyond what older chemistries can reliably deliver.
Highlights
- 6 V nominal voltage delivers stable power
- 0 Ah capacity supports high-energy applications
- Low self-discharge under 1 % per year at 20 °C retains charge
- Hermetic glass-to-metal seal prevents leakage for 10+ year life
- Non-flammable electrolyte improves safety under abuse
Specifications
| Type | Batteries |
|---|---|
| Battery Pack | 1-pack |
Questions about this item
What voltage does the ER18505 cell deliver and what capacity does it provide?
The ER18505 is a 3.6V primary lithium cell with a nominal capacity of 4.0Ah, giving high stable voltage and high energy over its life.
What physical size and sealing does the ER18505 use so I can confirm it fits my device?
It is an ER17/50 format cell with hermetic glass-to-metal sealing, preventing leakage and supporting a battery life over 10 years.
How should I install the ER18505 and what common mistake should I avoid?
Insert the single cell with correct polarity; do not attempt to recharge this primary lithium battery as it is non-rechargeable.
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