https://www.batteryequivalents.com/
"Ever look at your phone or power bank and wonder what that “mAh” number really means? You’re not alone. It shows up on batteries all the time—whether it’s on your smartphone, tablet, laptop, or those handy batteryequivalents you buy for gadgets. But what does it actually tell you? Let’s keep it simple. “mAh” stands for milliamp-hours. It’s a way to measure how much charge a battery can hold. Think of it as a fuel tank on a car—the bigger it is, the farther you can drive without refueling. So, the higher the mAh number, the longer your device can run