3.6V ER17335M Li-SoCl2 Battery 1700 mAh | Pkcell

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Passivation is an interesting natural phenomenon observed in Lithium Thionyl Chloride (LiSO₂Cl₂) batteries! When lithium metal touches the thionyl chloride (SOCl₂) electrolyte, a thin, protective layer forms on the surface of the lithium negative electrode. This layer, mostly made up of Lithium Chloride (LiCl), creates a high-resistance barrier that prevents a continuous reaction between the lithium and the electrolyte. Isn't it fascinating how this process helps maintain the battery's performance?

Passivation has some excellent benefits along with a few potential drawbacks that are important to consider:

Benefits:

• Low Self-Discharge: The passivation layer does a fantastic job of slowing down any unwanted side reactions between the lithium and the electrolyte, leading to an impressively low self-discharge rate. Thanks to this, LiSO₂Cl₂ batteries can be stored for many years, often over 10 years, while still keeping most of their capacity intact.
• Long Shelf Life: Because of the low self-discharge, these batteries can hold onto their energy for quite an extended period, which is great for long-term storage.

Potential Drawbacks:

• Voltage Delay: When a passivated battery starts discharging—especially after being stored or during high-current pulses—the current first needs to break through or dissolve the high-resistance passivation layer. This can temporarily drop the battery's voltage below its normal operating level before it bounces back. This occurrence is often referred to as "voltage delay."

The ER17335M is a Lithium Thionyl Chloride (Li-SOCl2) primary (non-rechargeable) battery, often in a 2/3A size. What makes it special is the "M" designation, which typically indicates a spirally wound construction. This design allows it to deliver higher pulse currents compared to standard bobbin-type Li-SOCl2 batteries, while still offering the impressive 3.6V output and long life characteristic of this chemistry.

Thanks to its ability to handle both low continuous drain and high current pulses, the ER17335M is widely used in professional and industrial settings. Common applications include smart utility meters (especially those with wireless communication), wireless security sensors, GPS tracking devices, certain medical instruments, industrial IoT devices, and memory backup in PLCs or other control systems where periodic data transmission is required.

No, the ER17335M battery is strictly non-rechargeable. It's a primary cell designed for single use. Attempting to recharge it is extremely dangerous and can lead to serious safety hazards, including leakage, overheating, rupture, fire, or even explosion. Always replace depleted ER17335M batteries with new ones.

The main difference lies in their internal construction and performance profile. A standard ER17335 typically uses a bobbin-type construction, which is optimized for very low continuous current drain and maximum longevity. The ER17335M, with its spirally wound construction, is designed to provide significantly higher pulse currents, making it suitable for applications that occasionally need more power, such as radio transmission or actuator activation.

While generally safe when used as intended, it's crucial to follow these safety measures:

• Never attempt to recharge them.
• Do not short-circuit the battery terminals.
• Avoid puncturing, crushing, disassembling, or heating the battery above its specified temperature limits.
• Store batteries in a cool, dry place, away from direct sunlight or extreme heat sources.
• Dispose of used or damaged batteries properly according to local regulations for lithium batteries.
• Keep batteries out of reach of children and pets.