The UNU Ultrapack will charge your smartphone at the normal speed, it really doesn’t improve your smartphone charging capabilities. However it is a perfect backup device and a must have if you travel a lot.
For example if you have about 15 to 20 minutes and your phone battery is totally dead. If you put your handset on a wall charger it might get some juice may be up to 20% but the phone will hardly last for few hours. Here is where the UNU Ultrapack comes handy. Instead of charging your phone you can charge the Ultrapack. With its fast self charging feature, within 15 minutes, the battery pack will have enough juice to fully charge your smartphone later on.
It takes about 30 minutes to fully charge the 3000 mAh battery Ultrapack and about 95 minutes to charge the 10,000 mAh battery Ultrapack.