Why is my power bank providing fewer charges than expected?
The capacity reduction during charging is due to a 30% to 45% energy loss in the battery cells and conversion circuitry. Therefore, a fully charged Anker Prime 20,000mAh Power Bank offers an estimated 11000mAh to 14000mAh to power devices.
How can I estimate the number of charges for my device?
To estimate charges, use this formula: (Power Bank Capacity × 0.65) ÷ Device Battery Capacity. For example, an iPhone 15 with a 3,877mAh battery can receive about 3.3 charges from a 20,000mAh power bank (calculated as (20,000mAh × 0.65) ÷ 3,877mAh).
How do you calculate the watt-hour capacity of this power bank?
This power bank uses four 5,000mAh cells at 3.6V. The calculation per cell is 3.6V × 5,000mAh / 1,000 = 18Wh. Multiplied by four, the total capacity is 72Wh, which is below the 100Wh limit set by airline regulations for carry-on electronics.
Technical Details
Brand: Anker
Product Dimensions: 12.7 x 4.98 x 5.46 cm; 544.31 g
Item model number: A1336
Color: Black
Batteries: 1 Lithium Polymer batteries required. (included)
Special features: Fast Charging
Item Weight: 544 g
Other display features: Wireless
200W Total Output: Equipped with two high-powered USB-C ports and one USB-A port totaling 200W output, quickly charge two laptops simultaneously at 100W each for maximum efficiency.
Lightning-Fast Recharge: The 100W rapid recharge via the USB-C port enables the power bank to be fully recharged in 1 hour and 15 minutes.
Power On the Move: With a compact size of 4.9 × 2.1 × 1.9 inches, the 20,000mAh power bank is designed to fit seamlessly into your bag, making it convenient for travel and ensuring you always have reliable power on the go.
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