|Battery capacity≠actual capacity
The big red box "20000mAh" is the battery capacity of Xiaomi, which can be understood as the theoretical capacity and battery cell capacity. During the power conversion process, energy consumption will occur, and the final effective power must not reach 20000mAh.
The battery capacity is 20000mAh. Why is the actual output capacity different by several thousand mAh? Take the 18650 battery cell as an example. The battery cell voltage is usually 3.7V, but the actual voltage when charging the mobile phone is 5V. According to the power bank conversion efficiency of 100%, the theoretical capacity converted to the output is 20000mAh×3.7/5 =14800mAh. So if you claim a 2w mAh power bank, the actual output capacity is about 14800, which is very good.
In order to compare the actual output capacity more fairly, we all use the conditions of 5V and 1A to test the discharge capacity, and it turns out that some power banks do not even reach 10,000.
main feature
-Ultra-large capacity 20000mAh portable power bank
-Two-way fast charging, whether it is charging or discharging, is more effective
-Support low current discharge, suitable for Bluetooth headsets and Xiaomi bracelets
-Made of high temperature resistant ABS material, round edge design
-LED indicator to show you power status
-Support simultaneous charging and discharging
-Fashionable design, compact size
-Built-in multiple protection
Brand: Xiaomi
Type: Standby power bank
Capacity range:> 10000mAh
Capacity (mAh): 20000mAh
Connection type: micro USB, two USB output ports
Battery type: lithium polymer battery
color: White
Material: ABS
Input: 5V / 2A, 9V / 2A, 12V / 1.5A
Output: 5.1V / 2.4A, 9V / 2A, 12V / 1.5A, maximum 18W
Package weight: 0.430 kg
Product size (length x width x height): 13.55 x 6.76 x 2.39 cm / 5.33 x 2.66 x 0.94 inches
Packing size (length x width x height): 17.00 x 9.50 x 3.50 cm / 6.69 x 3.74 x 1.38 inches
Package contents: 1 x mobile power supply, 1 x USB cable
Original Xiaomi 20000mAh mobile power bank 2 two-way fast charging dual USB output
Related Products:Teclast A10 10000mAh Power Bank High-density Dual USB
What is the difference between cheap and expensive power banks with the same nominal capacity?
- In terms of the production and manufacturing process of the battery cells of the power bank, the cheap power bank battery cells have poor quality and low cost, and the more expensive power bank battery cells have high costs;
- The peripheral control chip needs to be authorized by a fast charging agreement such as Apple Qualcomm, and the price will naturally be high;
- The design of appearance and service life will also cause price differences;Related Products
