![]() Most experts say that the average conversion efficiency range is between 60% to 80% for charging small devices (phone, tablet, headphones, etc.), so this could be slightly lower for larger devices (such as a laptop). The conversion efficiency will vary greatly. For computers that use a large amount of power (over 65W), this will also cause more heat to be generated, resulting in more power loss. As the power leaves the power bank and passes through the cable to your computer, you can anticipate that some power will be lost. As the voltage from the power bank is increased to the 20V current that the computer needs, heat is generated and some power will be lost. Most laptops charge at a current around 20V, which is significantly higher than the nominal voltage of the power bank (3.7V). Some of the most common ones are cable length, high charging voltages/currents, heat and the battery health of the computer. There are many things that can impact this. "Conversion efficiencyā€¯, is basically a comparison of how much power reaches the device being charged compared to how much power is transferred. ![]() Here's why " conversion efficiency" matters. Power will be lost while it is transferred from the power bank to your computer. ![]()
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