# # Two articles charged # 77 articles: capacity enough to be on the plane? Teclast Taipower A20 20000mAh Mobile Power Unpacking

**Foreword** A while back, the Samsung Galaxy Note 7 made headlines due to battery safety issues. Recently, the Apple iPhone 8 has also been in the news for similar concerns. It seems that battery safety is becoming an increasingly important topic. In everyday life, we might not always think about it, but when something goes wrong, it's best to be cautious and avoid risks. However, when it comes to air travel, things are different. You can't just throw a device out of the plane. That’s why the Civil Aviation Administration of China (CAAC) is very strict about portable power banks. Carrying one on a flight is no longer as simple as before — you have to meet specific regulations set by the CAAC and each airline. As an average consumer, it’s hard to keep up with all these rules. So, if a power bank has sufficient capacity and is clearly approved for air travel, it becomes a smart choice. **Out of the Box** ▼ The package was shipped via YTO Express, and it used SF tape — funny! Package ▼ Inside, the power bank was wrapped in bubble paper. Bubble Wrap ▼ After removing the bubble paper, I could see the packaging of the power bank. The brand name and product model are clearly marked at the top, with some color design and features listed nearby. Power Bank Packaging ▼ Specifications include 5V 2.1A input and a weight of 360g. Specifications ▼ There's a small orange label in the lower right corner indicating it's suitable for direct boarding. Boarding Label ▼ The side shows the color options. Color Options ▼ Detailed parameters of the power bank: Name: Mobile Power Cell Capacity: 20000mAh Product Family: A20 Dimensions: ~L150 x W64 x H23.5mm Weight: 360g Input: Micro USB, 5V/2A (Max) Output: 5V 2.1A Colors: Red, Gray, Blue, White Detailed Parameters ▼ The page-turn design allows you to open it and see through a plastic window inside. Page-Turn Design ▼ Side pages describe the buttons and interfaces. Buttons and Interfaces ▼ Pull-out design with a transparent plastic shell. Pull-Out Design ▼ Inside, there's the power bank, a short Micro USB cable, and a manual. Contents Manual and Cable **Exterior** ▼ The white color is quite elegant, with a black part on top that gives a modern look. White Design ▼ At the bottom, there's the Taipower logo. The white isn’t pure; it has a frosted texture with subtle color variations. Frosted Texture ▼ On the top, there are buttons and LED indicators. Top Panel ▼ Pressing the button shows the battery level via four LEDs. LED Indicators ▼ Front and back are similar, with large areas of white space. Front and Back ▼ The capacity is printed on the bottom. Capacity Label ▼ The top has a label for the interface. Interface Label ▼ The power bank is thick, with three layers and a raised middle section. Three-Layer Design ▼ Front has two USB-A ports and one Micro USB charging port. Ports **Testing** ▼ No-load voltage: 4.98742V No-Load Voltage ▼ Stepping current test: Max output 4.72V 2.8A 13.2W Stepping Current Test ▼ No-load voltage: 4.98869V Second No-Load Voltage ▼ Stepping current test: Max output 4.8V 2.8A 13.4W Second Stepping Current Test ▼ Charging an iPad Air 2 reaches 2.3A, supporting Apple 2.4A mode. iPad Charging ▼ Another interface is similar. Another Interface ▼ Charging a Xiaomi 6 is normal, around 8.6W. Xiaomi Charging ▼ Another interface is similar. Another Interface ▼ Charging both interfaces together results in a low voltage drop and total power around 11.5W, 2.6A. Dual Port Charging ▼ Charging current is around 1.9A. Charging Current ▼ Discharging at 5V 2.4A simulates charging an iPad Air 2, delivering 65.88Wh, with a conversion rate of ~89%. Discharge Test ▼ Charging curve shows a dip in the middle, taking 10h02min, with 89.53Wh consumed, giving a charging efficiency of ~82.65%. Charging Curve ▼ Final weight measurement is 366g, close to the rated 360g. Final Weight **Summary** 1. The design looks similar to other recent Taipower power banks, with a plastic shell and electroplating, giving it a shiny and colorful appearance. 2. Dual-output, single-input, max output ~12W, input ~10W, supports Apple 2.4A charging. Good for daily use, with excellent conversion rates. Two iPhones are no problem, but two iPads may push it a bit. 3. Still uses a Micro USB input, not Type-C — a bit disappointing. The plastic coating may wear over time. 4. The power bank clearly states it's safe for air travel, likely meeting CAAC requirements in terms of capacity and labeling. If not, it's easy to complain. **Thank you all!** **The End**

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