It is a single cell, compact, and powerful battery cell with 4300 mAh capacity. It is very convenient to install in your project to fulfill a 3.7 Volt requirement with high capacity. The battery terminals can use in any compatible battery adapter/holder or it can be permanently soldered to your application’s power source wires. Features: High performance and capacity High energy density. Excellent storage performance and low self-discharge rate Capacity, resistance, Voltage, platform time consistency is good. Good consistency and low self-discharge. Flat top to suit many devices fitting. High energy density High working voltage for single battery cells. Pollution-free, Long cycle life No memory effect Lightweight, small size Shape: Cylindrical Battery Battery Type: Lithium-Ion Battery Application: Portable equipment: POS, Portable printer, handset. Medical instrument: B ultrasound, Ecg monitoring instrument Military equipment: IR telescope Consumer electronics:PDA,MID,laptop,emergency light power source power tool e-bicycle Industrial and commercial instrument: light power meter, Gas testing instruments, fusion splicer, flaw detector Electric toy:RC car/ boat/helicopter