- Specifically designed for A3/2106 18V lithium batteries, this adapter delivers optimal functionality and user friendly operation. - Safe charging technology: the intelligent charging board protects your mobile devices from overcharging and excessive current during charging. - Dual USB charging: transform your electric tool battery into a dual USB charger for a smartphone or other devices, enabling charging of two devices simultaneously and helping to prevent low battery anxiety. - Quick reset function: if protection mode engages, simply disconnect the converter and reconnect to reset and resume normal use. - Compact and practical design: lightweight and portable, suitable for on-site work, workshops, and travel. - Performance and reliability: designed around 18V lithium batteries, providing stable charging through the integrated protection features. - Use scenario 1: on a job site, power your smartphone and another USB-powered device from the battery while using your compatible A3/2106 tool in parallel. - Use scenario 2: at the workshop or garage, keep two USB devices charged at the workbench without needing a mains outlet. - Use scenario 3: in remote locations, rely on a single A3/2106 18V battery to supply two USB ports for essential devices when mains power is unavailable.