Battery compatibility and use case This adapter is designed to work with 18V lithium batteries used in power tools. It extends the utility of these batteries by enabling you to power mobile devices when a conventional charger is not available, helping prevent downtime on site or in the field. Intelligent charging and protection It features an intelligent performance charging board paired with a protection board. The system provides overcharge, overcurrent, and voltage protection for connected devices, maintains a stable charging current, and includes a USB wakeup function for convenient use. Dual USB outputs The adapter provides two USB outputs to charge two devices simultaneously, with a 5V output to reliably power your gadgets. Convenience and reliability Easy to operate: insert the adapter into the battery slot to extend its functionality. Builtin protection helps safeguard your devices, and if the output stops, removing and re inserting the adapter restores output. Use scenarios On construction sites or in workshops, use a tool battery to charge a phone or tablet during breaks. In outdoor work, camping, or field projects where power is scarce, rely on the 18V battery to keep essential devices powered. When handling multiple devices, you can charge two devices at once while the battery powers your tools.