Enerpak Extreme Dual USB 2.1A Universal Battery Pack for Smartphones and Tablets


Enerpak Extreme Dual USB 2.1A Universal Battery Pack for Smartphones and Tablets


Recharge Your Products
Up to 7X's

Not to sound Extreme but this (14,000mAh) battery can recharge even the most powerful devices multiple times. The Extreme is built to keep dispensing power long after most other batteries have simply dried up.


Better Batteries
The Enerpak Extreme isn’t just “made” it’s engineered to be a finely tuned energy supply that helps you live a better life. In fact, we make sure every component of the Enerpak Extreme is the best it can be so you’ll have long-lasting power! Learn more about what’s inside a Enerpak Extreme and what makes it so great here!




Two Charging Ports Doubles
Charging Efficiency

Designed with two USB charging ports, the Extreme can charge two products at the same time! That means up to a 50% less wait time to charge your products. Plus, now you never have to worry about juggling precious USB charging ports again.



Easy to Use: Single
Button Interface

All within a single button you can turn your Extreme ON and OFF, toggle the integrated flashlight and check current power levels via the LED power indicator. Never has a portable battery been this easy to use!


Take the Extreme
With You!

Like all our Enerpaks, the Extreme is built to be portable. Take it with you on a trip, leave it in the car, or put it in a backpack, the Extreme is ready to go whenever you need it. Plus, with its huge power capacity, the Extreme is great for extended trips.


Built to Last

We use only the finest designs, materials, and people when creating our batteries to ensure 100% reliability from anything we produce. That’s why we gladly offer a 1 year warranty on all of our Enerpaks to ensure our products stand up to the tests our customer put them to.


Enerpak Extreme
Battery Capacity
Battery Type
Micro-USB Input
Smartphone Output
Tablet Output
4.9X2.9X.08 inches
10.7 ounces
Lifetime Cycles
Up to 500 Cycles

1. How many times can this device charge my iPhone?

A: Because each generation of iPhone has a different battery capacity charging results from the Enerpak Extreme can vary. However, iPhone 4 users can generally expect about six full charges while iPhone 5 users should expect about five.


2. Can I use this device to charge other, various devices?

A: Yes, the Enerpak Extreme is uNuversal, meaning you can use the Extreme to charge any devices that use a micro-USB port to charge!


3. I left my Enerpak in the car for a few hours, and when I returned the Enerpak was very hot, does this adversely affect the battery inside?

A: We recommended that the Enerpak is always kept in a cool location for a couple of reasons. One, heat will degrade the battery. Two, such a hot case could hurt you.


4. How many charging cycles does the Enerpak Extreme have?

A: The uNu Enerpak Extreme generally yields 500 charging cycles in its lifetime.


5. Can I use my own charging cables?

A: Yes, you can use your own charging cables, this way you can charge additional products like the iPhone 5. Please make sure the cables you use are in good condition.


6. Is the warranty for this product similar to the warranty on the phone cases?

A: All products sold by uNu Electronics are covered by a one-year manufacturer warranty. For more information on our warranty please click here.


7. What is special about this particular Enerpak?

A: The Enerpak Extreme has the ability to charge multiple products at once. The Extreme can charge both a smartphone and a tablet simultaneously. The 14,000mAh is the most powerful of all the uNu products, perfect for heavy-users and extended trips.


8. What can I do to get the most out of my battery?

A: Some helpful tips include: Fully charging the Enerpak by itself overnight before using the product for the first time and keeping the Enerpak out of extreme temperatures to minimize battery degradation. If you would like to learn more about how to get the most out of your Enerpak click here.


9. How do I charge my Enerpak?

A: Use the included micro-USB cable and attach the micro-USB (the smaller end) end into the Enerpak where it says “IN”. Plug the other end of the cable into an available USB port either on a computer or USB wall charger. If done properly an LED display will appear next to the power button on the front of the Enerpak and will begin flashing. If there is only one light flashing, the Enerpak is empty, if there are three lights the Enerpak is full.


10. How do I know if my Enerpak Extreme has power?

A: PRESS the power button on the side of the Enerpak once. A LED display will appear. The number of lights shown indicates the amount of charge left in the battery. 3 lights =100% - 66%, 2 lights = about 65% - 33%, 1 solid light = about 32% - 2%, and 1 light flashing = about 1%.


11. How do I turn my Enerpak Extreme ON and OFF?

A: Simply, press the power button on the side of the Enerpak to turn it ON. The Enerpak will automatically turn OFF after 25 seconds of non-use.


12. What's the difference between the Tablet and Smartphone Charging Ports?

A: The two ports have different power outputs. The Smartphone output port has a 5V/1A output used for charging smart-phones, iPods and MP3’s. The Tablet port has a 5V/2.1A output to charge larger devices like tablets and e-readers.


13. I need more help with my Enerpak!

A: If you do not see the answer you are looking for here. We also have a general FAQ section which might help answer your question, or you can go to our technical support page to ask a specific question.