Customer Ratings & Reviews

This portable charger charges very fast and is easy to use

Bought two of these for my kids. They can charge two devices at once. And get about 7 charges out of it

Very good and reliable. Charges quick and durable.

Works great but it's a little heavy! It's worth it tho!

This battery is heavy but it works great and can charge my phone multiple times

I used this charger countless times while traveling to the other side of the planet. Came in handy to recharge my GoPro and cell phone multiple times during long days. Not heavy and the smooth texture make it easy to carry. Only thing I didn't like much was that I had to remember to press the button to start charging. Definitely worth every penny.

This block holds enough power to charge several cell phones or devices but was on the bulky side to carry around. In the end my son decided he would prefer something smaller.

I'm a bit over the top in needing to know I have power for my electronics at all times. Purchased this to bring with me on those long days when I may not be near a power source or in my car. This charges all of my items including iPhones and iPads very rapidly and just charges in a few hours overnight so it's ready to go for the next time it's needed.

Bought for Pokemon Go, I run a Galaxy 5. Does really well even for those days out when you run your phone down. and need the extra charge for navigation or whatever else you need. I'll probably always carry it now. I get maybe 3-4 full charges..hard to say but I can spends hours without worry playing pokemon go , watching videos, playing apps.

I have tried reading the manual regarding if this battery pack has "smart ports" regarding the power to charge my devices since the max output stated in the manual is 3.1 A. I bought this for the exact purpose of charging a tablet I am planning to purchase. It has enough charge to last for days on my Pebble smartwatch and Moto X Pure Edition (also planning to upgrade thsoe as well). It 's a purchase the user won't regret.

Well constructed, fast charging, long lasting. A plus product.

Very good charger. Easy to charge and use and it charges two things that need charging at a time.

Since I use both an iPad and an iPhone for work, I needed something that could charge both simultaneously. The Tzumi does the job. I opted for the 12000 mAh to be sure I always had a charge. The only negative, if there is one, is that it is healthier than other products. Carrying it and an iPad and an iPhone makes a heavy package.

Recharges quickly and holds a charge. Convenient to carry.

I can easily fully charge my phone up to four times with this charger. Also, I was able to keep my phone fully charged for an entire 16 hour road trip and still had juice left in the charger. Great product, no more searching for wall plugs.

I purchased based on Best Buy employee recommendation. The charger seems to charge an IPhone 6 quickly and I've used on two overseas flights without issue. The short micro USB cord provided is "brittle". Minimal flexing of the short cable caused the cable to be replaced after 6 charges. If you buy, make sure you have a replacement charging cable available as the one provided is not robust and will need to be replaced.

I can used for my husband cell phone and for my cell phone at the same time

Works the best and longest that I've ever purshased

Portable, charges fast and holds a charge for a long time.

Perfect size and shape for carrying around. Charges quick and easy to use. Excellent price.