

With elementary math, consumers could easily calculate battery life by dividing watt-hours by power consumption.
I mean, for something like an LED, maybe, but a lot of computing devices can vary power consumption based on what they’re doing.
I do agree that it’s pretty ridiculous that anyone is selling a power bank without a watt-hour rating.
Non-mobile-specific version:
https://www.cnn.com/2025/04/03/investing/us-stock-market/index.html