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Polymer Lithium-ion Battery UL1642 Certification

What's UL1642 certification? What's UL1642 standard for polymer lithium-ion battery? What's the test items of UL1642 certification?

5000mAh UL certified lithium battery

Wha's lithium polymer battery UL1642?

UL is short for Underwriters Laboratories Inc. UL certification is a non-compulsory certification in the United States, mainly testing and certification of product safety performance, and its certification scope does not include the product’s EMC (electromagnetic compatibility) characteristics. It uses scientific testing methods to study and determine whether materials, devices, products, equipment, buildings, etc. are hazardous or harmful to life and property.
In short, it is mainly engaged in product safety certification and operating safety certification business. Its ultimate purpose is to obtain products with the right level of security for the market and to contribute to ensuring personal health and property safety.

Lithium polymer battery UL1642 certification requirements cover rechargeable lithium-ion batteries for use as a power supply in the products. These lithium-ion batteries contain metallic lithium, a lithium alloy. They may consist of a single electrochemical cell or two or more cells connected in parallels or series, or both, that convert chemical energy into electrical energy by an irreversible or reversible chemical reaction.

UL1642 certification requirements cover lithium-ion batteries intended for use in technician-replaceable or user-replaceable applications.

UL1642 certification requirements are made for avoiding the risk of fire or explosion when lithium-ion batteries are working in a product. The final acceptability of these lithium-ion batteries is dependent on their use in a complete product that complies with UL1642 certification applicable to such products.

UL1642 certification requirements are also intended for avoiding the risk of injury to persons due to fire or explosion when user-replaceable lithium-ion batteries are removed from a product and discarded.

UL1642 certification requirements cover technician-replaceable lithium-ion batteries that contain 5.0g or less of metallic lithium. A lithium-ion battery containing more than 5.0g of lithium-ion is judged based on compliance with the requirements in this UL1642 standard, insofar as they are applicable, and further examination and test to determine whether the lithium-ion battery is acceptable for its intended uses.

UL1642 certification requirements cover user-replaceable lithium-ion batteries that contain 4.0g or less of metallic lithium-ion with not more than 1.0g of metallic lithium in each electrochemical cell. A lithium-ion battery is holding more than 4.0g or a cell containing more than 1.0g lithium-ion may require further examination and test to determine whether the cells or batteries are acceptable for their intended uses.

UL1642 certification requirements do not cover the toxicity risk that may result from the ingestion of a lithium-ion battery or its contents, nor the risk of injury to persons that may occur if a lithium-ion battery is cut open to provide access to the metallic lithium.

1. Description of the lithium-ion battery

The tested sample of lithium-ion batteries is created with only one single lithium-ion cell and doesn’t have any over current and short - circuits.

1) These tested lithium-ion cells have not been evaluated in combination with charger or host products. Additional evaluation to determine compliance may be required on the combinations in the end product evaluation.

2) The tested lithium-ion cells were evaluated for maximum voltage limit outlined and charge current. The end product evaluation shall ensure that current and voltage limits noted are maintained.

3) The tested lithium-ion cell shall be fixed in a case with sufficient protective strength as a mechanical enclosure and fire enclosure. The end product shall keep away from fire and high-temperature areas.

2. The General of UL1642 Certification

2.1 The casing of a lithium-ion battery shall have the power and rigidity necessary to resist the abuses to which it may be subjected, without resulting in a risk of fire. The casing of a user-replaceable lithium battery shall have the strength and rigidity necessary to resist the abuses to which it may be subjected without resulting in a risk of injury to persons.

2.2 A lithium-ion cell of a user-replaceable battery shall be in a hard casing of adequate strength to prevent flexing. A tool providing the mechanical advantage of pliers, screwdriver, or hacksaw shall be the minimum capable of opening the user-replaceable cell casing if the opening of the housing will expose metallic lithium.

2.3 A user-replaceable battery shall not contain pressurized vapor or liquid that could spray materials into the eyes or leak more than 5 milliliters of liquid when the battery casing is punctured under standard laboratory conditions, 23 ±2°C (73 ±3.6°F).

2.4 A lithium-ion battery shall be protected from abnormal charging currents during use. A lithium-ion battery tested and found satisfactory for the charging current, IC, MOS, under fault conditions specified by the battery manufacturer. The lithium-ion battery shall be protected from high charging currents in the end product application by two blocking parts, such as diodes, or one blocking parts, and one current limiting component, such as a resistor or a fuse.

The charging current limiting component shall limit the charging current to one-third of the value used in the abnormal charging test.

3. What's the test items of UL1642 certification?

1). Short-Circuit Test of UL1642 Certification.

2). Abnormal Charging Test of UL1642 Certification.

3). Forced-Discharged Test of UL1642.

4). Crush Test of UL1642 Certification.

5). Impact Test of UL1642 Certification .

6). Shock Test of UL1642 Certification.

7). Vibration Test of UL1642 Certification.

8). Heating Test of UL1642 Certification.

9). Temperature Cycling Test of UL1642 Certification.

10). Low Pressure (Altitude Simulation) Test of UL1642 Certification


The battery manufacturer should mark lithium-ion battery legibly and lastingly with:

a). The name, trade name, or trademark or another descriptive of the manufacturer naming by which the organization responsible for the product may be identified;

b). A distinctive part number or the equivalent;

c). The date code or another dating period of manufacture not exceeding any three consecutive months. If a manufacturer produces a battery at more than one factory, each battery-package shall have a characteristic marking to identify it as the product of a particular factory.

Our company can help customers to apply for the UL1642 test report. Each test takes 1-2 months after then you will get an official UL1642 test report.

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