Customer Ratings & Reviews

Works great! I used it to charge my phone on a trip. I had a rental car and needed something that charge my phone in between using Google Maps to get places. Even on the day I used my phone the most, the Tzumi still had 50% battery left.

I purchased this unit and carry it daily. Worth its weight in gold!

This was a lot of money for a charger but think it will be worth it.

I use these when I take my Grandson back to Arizona. He's wears out tablet batteries. This give me all the power I need for the entire trip and more. I keep one in each car so I never miss having one with me.

I took this on a trip to europe, it was super handy to have, knowing that everywhere I would have a change on my phone, headphones, etc. The USB cable it comes with is very short, would recommend just using one from your phone instead.

It is exactly what i was looking for! I use an app that sucks the sucks the juice from my battery and with this charger, no need to worry about phone going dead!!!

Does the work perfectly, great power source. I'll recommend this.

Really like this product, keep all my device charged up during my vacation!

I have a few what I consider emergency chargers but they are smaller and dont give the best of a charge... This baby... holds a lot of power to feed your dead "toys" AND...can feed more than one at a time!!

Enough amps to last a while. For the price it's well worth it...

I bought this for use during a vacation. I charged it before I left and was able to charge my phone whenever I needed. Haven’t used it since my trip since I always have access to other forms of charging

This charger was purchased to replace a stolen one and I am happy with it. It charges multiple devices fairly quickly. My only "complaint" is that the cable that comes with it is so short as to essentially unusable.

This is the best invention yet! This power supply lasts for weeks in my purse when not using so it's always ready. When using it, it lasts for quite a few days!

Love the fact that it has two usb outlets. It's a great item to have especially when you can't find an outlet closeby. I'm using it on vacation right now for 2 phones, my gopro and a mobile hotspot router. Works great!!

I love the convenience of having back up power when I travel.

The speed the unit charges your device is very quick so you don't have to wait long for usable power levels, but I've started having issues recharging the unit. I bought this for camping over Memorial Day weekend, and it lasted all four days on one charge to keep up with my phone and ipad. But not that's i'm trying to recharge it, only the first bar of the power indicator lights up and dies quickly after a couple of charges. I'm going to take it in to return and get another one. Hopefully this was just a dud and not a constant battery issue.

I was surprised at the charging capacity of this power charger, and even more by how fast it charges my phone from 0 to 100% in less than 90 min. Must have if you travel a lot during the day and don't have access to outlets.

My husband used this on a four day camping trip and was able to keep his cell phone charged without any problems and there were still charges left. The portable charger has to be recharged and that does take some time.

This battery pack did what is was supposed to do without any glitches whatsoever. I was able to keep my phone charged for 3 days straight using this battery pack. I would recommend it to anyone needing one.

Bought 1 that was a 12000 for myself then went back and got 2 for the grandkids but got them the 15000 since they are on their phones all the time