... features of portable and travel made it possible for you to charge your tablet pc and laptop anytime and anywhere! And the elegant ... polymer: 3.7V/21000 mAh/15000mAh (optional)2.Output voltage:(Optional)5V/8.4V/9.5V/12V/16V/19V/24V.3.Output ... current:Varies with the input voltage6. Batteries life: 500 cycles 7.Can work with LAPTOP, mobile phone ,headlamps, flashlights, laterns, intercoms ...