Customer Ratings & Reviews

This is a wonderful charger. It will charge a device multiple times and it charges fast. Sometimes it is even faster than the wall charger.

This was perfect and reasonably priced for the amount of uses you get out of it. Used it on a 12 hour flight and still had two bars lefts

This back up portable charger is a life saver. Charges my phone fast my wife loves it. After several months of use it is still running great.

I have had the Tzumi 12000 mAh for over 1-1/2 years and use it from time to time, mostly when I travel. But it has been a very reliable spare battery for me, is still strong after over 1-1/2 years and I've never come close to running out of juice with it. I would rate the quality and value excellent except that I have not pushed the device hard enough to really be sure what it is capable of.

This is a great portable charger and it holds a charge for a long time. It is comparable to the more expensive Mophie chargers and is a great deal.

This is my favorite power pack out the bunch. Holds a charge really well and is still compact despite it being able to power multiple devices.

Great product. No need to plug in at the airport or sit in your car if the lights go out. Can charge 2 devices at once. Battery life seem good.

I purchased this based on reviews. it has great reviews, and holds a charge. I use this to charge my iPhone when I am low on battery, and my GoPro batteries. Of course this will work with anything USB. It holds a charge when not in use. I like the status indicator when I need to see how much power is left in bank. It has 4 status LED bars. I can fully charge my iPhone 7plus and it will still show 4 bars. Great product with lots of backup support.

Recharges my phone really fast. And is small enough to fit in my pocket. I have one and bought one for my son for Christmas. Can take it anywhere.

Great charger. Been using it for Pokemon Go runs and it keeps my phone charged. Even has power to charge two additional phones on one single battery

Very easy to charge; holds the charge well for at least 5 days as it recharged tablet and mobile phone quickly when away from an AC power source

If you're looking for an external back-up power source that can handle charging multiple devices, this is a very good choice at a reasonable price.

I used this to charge 2 phones and a tablet and still could have charged more best charger I have gotten so far price is not bad for what you get

Bought this to use for New York Comic Con 2016. I charged it fully before using and then took it with me. My two kids and I charged our iPhones multiple times throughout the day (whenever we would be waiting in line or sitting in a panel) to keep us all at 100% in case of anything. We made it through the 9 hour day there plus able to top off our phones on the car ride home and still had plenty of juice for additional charges. It worked so great I bought a second one for when we went our separate ways. Would definitely recommend this product.

This charger has more than met my expectations. It’s quick and lasts for all the time I need to use it - flying or traveling!

This charger holds a charger for a long time and can charge my phone multiple times. It is better than the higher price competitive products.

It's extremely portable and can fit in any of my pockets and I don't notice it's there. Plenty of juice and can charge my phone multiple times

This think charges everything. Lady’s long and I love it! I take it when I go out. Compact though a little heavy. Either way I love it.

It charges my cellphone really fast. And once it is full charged, it is able to charge my cellphone several times. I am satisfied with it!

This is a great charger that packs a lot of power! It is heavier Thani thought it may be & it takes a while to recharge. Overall still great