Why is 10,000 mAh more expensive than 20,000 mAh? Mainly because of these three points.

Have you noticed that there is a significant price range for power banks? Even with the same 10,000mAh capacity, the prices can vary from 30 RMB to 200 RMB. Strangely enough, power banks don’t always adhere to the rule that the larger the capacity, the higher the price. For example, a Romoss power bank with a 10,000mAh capacity is priced at 149 RMB, while a 20,000mAh capacity is priced at 124 RMB. The larger capacity is actually cheaper by 25 yuan! Another example is BuyKey’s Power Bank 3, where both the 10,000mAh and 20,000mAh versions are priced at 109 RMB.

Why is this? Why are larger capacities cheaper? After comparing various data, I’ve narrowed it down to the following three reasons. Let’s take a look:
Different battery cells inside the power bank. Take Romoss as an example. The 10,000mAh power bank uses high-quality lithium polymer cells, while the 20,000mAh power bank uses ordinary lithium cells. Most power banks on the market use lithium cells, but lithium polymer cells are safer, have a higher energy density, are less prone to overheating, and have a longer lifespan. Therefore, power banks with lithium polymer cells tend to be more expensive.

Different fast charging protocols and output powers. Xiaomi’s Power Bank 3, for instance, offers both 10,000mAh and 20,000mAh versions priced at 109 yuan. Both use high-quality lithium-ion polymer batteries, but they differ in fast charging protocols and output powers. The 10,000mAh power bank supports a maximum output of 22.5W and Apple’s PD20W fast charging, while the 20,000mAh power bank supports a maximum output of 18W. Higher output powers result in faster charging speeds, leading to higher prices.

The 10,000mAh power bank has a smaller size and higher usage rate. Both the Romoss and Xiaomi examples mentioned earlier show that the 10,000mAh power banks have a smaller size than the 20,000mAh versions. For instance, Xiaomi’s 10,000mAh power bank is half the size of its 20,000mAh counterpart, making it lighter and easier to carry in a pocket. This is due to the high-density characteristics of lithium polymer cells, which allow for smaller batteries with the same capacity. Additionally, for daily use, a 10,000mAh power bank is often sufficient, making it more popular and in demand, which can also affect prices.

Other factors such as the number of ports, design, and branding can also influence the price of power banks. Ultimately, it’s important to choose a power bank based on your individual needs and budget. For weekend outings, a lightweight and compact 10,000mAh power bank is often a good choice.”
I hope this translation helps! If you have any other questions or need further assistance, feel free to ask.