This refers to the output capacity at 5V2A. Cell capacity does not equal output capacity. Rated capacity refers to the rated capacity of this power bank, and battery cell capacity is the actual capacity of this power bank. However, when the capacity is emitted, some of it will be lost as the power bank heats up. The capacity of the power bank is 5000 mAh, so it can output 5000 mAh.
The relationship between the battery capacity and the output capacity of the external battery can be calculated: the output current is based on the capacity = 3.7X10000X η /?5?. The power bank needs to step up the battery cell's 3.7V voltage to a 5V output, which requires conversion. eta is the efficiency of the transformation.
Detailed information:
1. Lithium batteries discharge automatically, so charge them in time after use to prevent the battery voltage from being too low.
2. Recharge the battery every 3-6 months and charge it to 80% each time. Only with such care can the battery of the lithium battery electric bike last longer and have a longer service life.
3. If the lithium battery is not used for a long time, it should be charged to 50% to 80% of its capacity and stored in a dry and cool environment. The battery should be charged every 3 months. avoid excessive storage time and battery damage. The battery is too weak due to self-discharge, resulting in irreversible loss of capacity.
Self-discharge of lithium batteries is affected by ambient temperature and humidity. A tempHigh temperature and humidity will accelerate the battery's self-discharge. It is recommended to store the battery in a dry environment between 0℃ and 20℃. .Rated capacity and battery capacity of the power bank
The battery capacity is the battery capacity of the power bank, and Rated capacity is the output capacity of the mobile power supply specified by the manufacturer. The difference between the two is that the battery cell capacity of the power bank is converted into the cell phone battery capacity through the boost circuit of the power bank, the internal resistance of the cable charging the mobile phone, the contact resistance of the plug at both ends of the charging cable, the power management circuit of the mobile phone and the internal resistance of the battery core and other losses, there will be loss of approximately30 %.
Battery capacity is the capacity of the power bank's battery, in amp-hours (Ah) or milliamp-hours (mAh) and the rated capacity is the capacity of the specified mobile power supply; by the manufacturer Output capacity, expressed in C, ampere-hour (Ah) or milliamp-hour (mAh).
In the process of converting the battery capacity of the power bank into the battery capacity of the mobile phone, there will be a loss of about 30%. Therefore, the rated capacity of the external battery is lower than the battery capacity. In addition to rated capacity and battery capacity, power banks also have other important parameters including input voltage and output voltage. Input voltage refers to the voltage received by the power bank, usually 5V or 9V; output voltage refers to the voltage of the outputpowered by the power bank. Voltage, mobile phone charging is generally 5V.
In addition, the charging efficiency of the power bank will also affect its performance. Charging efficiency refers to the ratio of the amount of electricity actually charged in the battery to the amount of electricity produced by charger A. The high-efficiency power bank can fill the battery faster and can reduce the waste of electricity. The size, weight and appearance design of the power bank are also factors to consider. Ideal choice for travel or daily use.
Precautions for using the external battery
1. Do not drop, bang or shake the external battery. This may damage the internal structure of the lithium battery. be misaligned. The lightest consequence is a short circuit, and the consequenceThe most serious event may be spontaneous combustion or even an explosion of the lithium battery.
2. Please do not put the power bank into water. The power bank is not waterproof and can easily cause leakage, short circuit or other malfunctions when exposed to water. At the same time, water is a conductive object. If it accidentally falls into the water, remember to quickly pick up the power bank with your bare hands. Users should wear rubber gloves and other protective tools when picking it up.
3. Avoid long-term exposure to sun or rain. The ideal place to place the power bank should be a dry and soft environment. If it comes into contact with liquid, it is easy to cause accidents. to corrosion of electronic components and circuits. High temperatures This will shorten the life of electronic devices, damage thes batteries and will degrade certain plastics.