Mobile power supply, also known as power bank, travel charger, etc., is a portable charger that integrates power supply and charging functions, which can charge digital devices such as mobile phones and tablet computers anytime, anywhere. Common mobile power supplies are composed of batteries (blocks), protective circuit boards, shell packaging materials, thermistors, PTC (thermistor) and other parts.
Quality Analysis
From the results of supervision and spot checks in recent years, the unqualified items of mobile power supply products mainly focus on three indicators: identification, effective output capacity at room temperature, and conversion efficiency.
1
logo
This item mainly checks whether the mobile power supply body is marked with the name, model, rated input voltage and current, rated output voltage and current, rated capacity, battery or battery type and rated energy according to the standard requirements; products with multiple output ports also need to identify the total current value of the output voltage of the same file, and mark the rated output voltage and current of the port near each output port. If the total current value of the output voltage of the same file is not explicitly indicated, consumers cannot confirm whether the mobile power supply and electronic products match, which will trigger the corresponding charging protection to interrupt charging, and even cause battery fires and other hazards.
Qualified product legend
legend of unqualified products
2
Effective output capacity at room temperature
This project mainly checks whether the actual effective output capacity of the mobile power supply meets the requirements of the standard at room temperature. If the product has a false rated capacity and effective output capacity, it will mislead consumers, affect actual use, and even pose a safety hazard.
Unqualified product rated capacity identification
Measured result data
3
conversion efficiency
The conversion efficiency of the mobile power supply should comply with the express value of the manufacturer’s mobile power supply instructions. If not, it should not be less than 80%. The conversion efficiency is not up to standard, the loss during the power conversion process is too large, and consumers feel that the capacity is insufficient when actually using it, reducing the use experience.
Buying suggestions
Check product appearance and logo
When purchasing, you should carefully check whether the product identification and information are complete, and whether the product appearance is clean, no cracks, no corrosion, etc. The product should have the product name, model, rated capacity (rated energy), battery energy (battery capacity), factory name or trademark; the input and output ports should have the port name and rated voltage and current value; The packaging should be marked with safety warnings, production date or batch number, factory name and address; The repeated content of the packaging and the logo on the mobile power supply body must be consistent. For mobile power supplies without warning labels, no brand models, no input and output parameters, no execution standards, and no instructions for use, the purchase should be avoided.
Identify qualified products
Select the right product specification
The size of the capacity determines the amount of stored power, which directly affects the use time. It is an important reference for purchasing a mobile power supply. The larger the capacity, the larger the body size, and the higher the price. When purchasing, the cost performance and portability should be comprehensively considered according to the needs of use. In addition, when carrying mobile power products on the plane, relevant regulations should be followed. "The rated energy of the power bank does not exceed 100Wh, and it does not require the approval of the airline; the rated energy exceeds 100Wh but does not exceed 160Wh, and it can be carried after the approval of the airline". Among them, 100Wh is equivalent to a mobile power supply with 27000mAh battery energy, and 160Wh is equivalent to a mobile power supply with 43000mAh battery energy.
Rated energy over 100Wh logo
Pay attention to the production date and charger.
The closer the production date, the less the battery capacity of the product decays; choose a charger reasonably, and it is best to choose a charger that is the same manufacturer or compatible with the product.
Pay attention to check the production date and select the recently produced product.
View the "CCC" certification mark
From August 1, 2023, the state will implement CCC certification management for mobile power supplies. From August 1, 2024, those who have not obtained the CCC certification certificate and marked the certification mark shall not leave the factory, sell, import or use it in other business activities. Consumers should pay attention to check the "CCC" certification mark of the product when purchasing.
Tips for use
1
Pay attention to the charging voltage and current
Mobile power supplies are generally over-charged, over-discharged and other protection, do not wait for the use of electricity to exhaust the booster charge, will shorten the service life of the battery; read the product instruction manual in detail, according to the nominal parameters to charge, avoid using greater than the input voltage to charge the mobile power supply, to prevent damage to internal components and batteries, affecting the service life of the power supply.
2
Pay attention to the ambient temperature
Excessive ambient temperature will not only cause the electrolyte inside the battery to evaporate, causing serious damage to the battery, but also make it difficult for the mobile power supply to dissipate heat, which is prone to fire and explosion. During use or shelving, do not expose the mobile power supply to the sun, let alone put the mobile power supply in a car closed in summer. If the mobile power supply product is found to be abnormally hot under normal working or storage conditions, it should be stopped immediately.
3
Be careful to prevent short circuits
In daily use, products should avoid contact with water, beverages, metal parts or similar conductive media to prevent short circuits; avoid contact with heavy objects or sharp metal parts to prevent internal batteries from being deformed by heavy objects or pierced by sharp metals, which can easily cause explosions.
4
Pay attention to usage habits
Avoid charging and discharging as much as possible. Charging and discharging will increase the heat, causing the temperature to rise too high and damaging components. When charging and discharging, the mobile power supply should be placed away from flammable and explosive items. If the charging indicator light (device) shows that the product has been charged, the charging circuit should be disconnected in time.
5
Pay attention to daily maintenance
When not in use, charge the mobile power supply regularly, usually once every one to two months, to protect the battery’s activity.