3.7V FARPHONE BUTTON (ROUND)

The 3.7V Farphone Button (Round) refers to a compact, round-shaped Li-ion rechargeable battery, commonly used in small devices such as button-cell powered wearables, Bluetooth gadgets, or specific modules within Farphone or similar low-profile electronics. Although the term "Farphone" might be a brand-specific or localized product name, the primary characteristics align with a coin or button-type lithium-ion cell delivering 3.7V nominal voltage.

These batteries are favored for their lightweight, flat design and stable voltage output, making them ideal for ultra-compact, low-power electronic devices.