Answer
Aug 20, 2025 - 09:27 AM
The numbers on a battery typically indicate its size, capacity, and specifications. For example, a number like "18650" on a lithium-ion battery refers to its dimensions (18mm in diameter and 65mm in length), while other numbers may denote the battery's voltage and milliampere-hour (mAh) rating, which indicates how much charge it can store. These numbers help users choose the correct battery for their devices.
