Use PSP adapter to charge this charger and save the electronicenergy into the lithiumbattery inside firstly. Use the matched cable to connect this charger with other game consoles such as PSP, NDS Lite, NDS, GBA SP to charge them. The emergency charger comes with a LED light, it will become red when the battery is being recharged (use PSP AC adapter) and it will turn green when the battery is charged fully. Input voltage: 5V. Output voltage (via lithiumbattery): 5V (700mAh). Battery Capacity: 8800mAh. High qualityproduct. Easy to use.