Vmargera&reg; 4-in-1 4 Battery Charger for Hubsan / Syma X5C X5SW X5SC X5A X5 Made of first-grade plastic material, durable, light weight This charger can charge 4 batteries at the same time. Intelligent IC chip inside recognizes a fully charged battery and automatically switches to a saver mode to prevent overcharging and short circuit. Voltage input: DC 5V Voltage output: 4.2V  5% Current output: 350mAh - 410 mAh