A 100mAh lithium battery is a compact, lightweight, and high-energy-density power solution, ideal for small electronic devices. It offers long cycle life, low self-discharge, customizable shapes, and strong safety features with protections against overcharge, over-discharge, and short circuits. Widely used in wearable electronics, it powers smartwatches, fitness trackers, heart rate monitors, and Bluetooth earphones. In healthcare, it’s found in hearing aids, medical patches, and ECG monitors. It also supports IoT devices like smart locks, trackers, and sensors. Other applications include mini remote controls, digital pens, GPS devices, wireless mics, and beauty gadgets like eye massagers. With CE, RoHS, and UN38.3 certifications, the 100mAh lithium battery is a reliable and eco-friendly choice for modern compact electronics.