Explanation of the Three Warranty Periods Of Lithium-ion Battery

1 Battery storage life: 10 years

The long-term protection provided by the passivation film results in an extremely low self-discharge rate for lithium thionyl chloride batteries. The theoretical shelf life can extend beyond 10 years.

Warranty Clause:

Strict Storage Conditions:

- Temperature: Constant temperature of 0–10°C (fluctuation ≤ ±2°C);

- Humidity: Relative humidity ≤ 40%;

- Environment: Light-proof and vibration-free.

2 Battery storage period in inventory: 3 months

Principle Analysis:During storage, the lithium anode in a lithium thionyl chloride battery reacts with the SOCl₂ electrolyte to form a dense LiCl passivation film. This film inhibits further self-discharge.In the initial storage period (within 3 months), the passivation film is

relatively thin (approximately 0. 1–0.5 µm), and the internal resistance of the battery is low (<10 Ω). This allows the battery to directly meet the instantaneous high-pulse current demands of devices (e.g., wireless communication modules).As the storage time extends, the

passivation film thickens (e.g., reaching 0.8–1.2 µm after 3 months). This results in a need to “break through” the passivation film during

the initial discharge, which manifests as a delayed voltage drop (a temporary voltage dip to 2.5–3.0 V at startup). For low-power devices

(e.g., sensors), the initial insufficient voltage may prevent the circuit from waking up.Storage Conditions Clause:It is recommended to use the battery within 3 months to ensure that it can meet the nominal pulse current without pre-activation (e.g., the typical pulse current of 100 mA for ER14250).If the battery is not used within this period, it may fail to meet the nominal maximum operating current or pulse

current.The following methods can be used to eliminate voltage lag:Pre-discharge Activation: Briefly discharge the battery at a low current (e.g., 0. 1C) until it reaches 3.3 V.High-Temperature Aging: Place the battery at 50°C for 24 hours to accelerate the partial dissolution of the passivation film.

This is the best use time. Within 3 months, the battery was ready for direct use with optimal performance.

3 Manufacturer's warranty date: Within 1 year from shipment.

Warranty Clause:

Warranty Period: 1 Year (Performance Guarantee Period) Causes of Battery Performance Failure During Production:

Leakage:Low voltage, zero voltage, and other quality issues Warranty Commitment (Within 1 Year):

Leakage: If sealing failure due to our manufacturing process results in electrolyte leakage, we will provide a free replacement.

High Self-Discharge Beyond the Normal Range: This is characterized by an open-circuit voltage below 3.4V after activation