Customer Ratings & Reviews

This thing has a lot of power!! It charges my iPhone fast! Indicator lights are great feature...a bit heavy but great overall

Great build quality thin rechargeable battery for cells, iPods and tablets. Comes charged, I've used it several time for my Samsung Galaxy 8 before the unit needed its first charge. Fits easily in your pocket so a cell charge is always available. I try to keep my cell battery charge to between 20% and 80% not either fully discharged nor fully charged. I've read that the cell battery will have a longer useful life if its charge remains within that range.

This battery is okay. It charges well, but definitely fast. Takes over an hour to charge my Samsung S7 from 15%. You could very around 3 full charges out of this battery before recharging it. Price was fair.

I recently bought this portable charger for my vacation. It was worth it. It lasted for a while, and to recharge the battery itself didn’t take long.

I purchased prior to heading on a 7 flight trip back and forth across the US. The stamina of the unit is great and I was able to charge 2 devices simultaneously. I discovered that doing so obviously slows the recharge so I chose to do 1 device at a time. I plugged in with 14% left. After three hours my device was at 36%, and finally after 9 hours it was 100%. I resorted to keeping the Tzumi plugged into my device, which is very heavy and unruly. Question to Best Buy/Tzumi - are there cables that will assist speed of charge? I thought the 3" cable that comes with the unit was specifically designed to make faster flow. Apparently not.

We bought this to take with us to Disney. We knew we would need extra battery power on the flight to Orlando and running around the parks. So glad we did as taking a million photos and using the Disney app all day booking fast passes and dinner reservations ate through our phone batteries. Thankful we had this with us. We’ve used it often since and it worked great.

Easy to use out of the box. Charges devices quickly. I use mainly as secondary charge for oculus go. Only negative is included cable is way too short.

This is easy to charge and to use to charge your phone. Works great and will charge your phone a number of times.

This does exactly what it says it will do. Holds a charge for a very long time and recharges my iPhone without issues.

This charge pack is easy and fast to use. I have an IPhone 6 ,so my battery life is usually 3hrs. Great Product

I love it, this is great for long days specially if you are with someone else they can also charge at the same time.

This item is easily stored in a purse or backpack. It seems to charge my phone quicker than a wall unit charger.

Works really great, compact fits perfectly in your pocket. I was Able to charge my phone multiple times including my iPad and an iPod on 1 charge

Easy to use and re-charge. I was able to fully charge my Samsung S8 three times on one charge.

It served its purpose. It gave me multiple charges. It was perfect for my trip. It is heavy but considering I had my backpack through my trip it was ok.

It charges your cell phone completely very quick! and it still have power for another charge!.

This product fits my backpack perfectly and recharges cell phones and portable speakers super fast!

The product is really durable and gives your a good power backup. Good for my charging multiple phones together.

I didn't like my husband having to turn the phone off to save the battery while wilderness camping without me. After an emergency we needed to do something. The last time we were apart without an outlet he had this handy little gadget that kept the connection in case we needed it. No emergency but he called each night. On that last trip he recharged his iPhone 4 times. It gives me peace of mind to know I can reach him if I need to, and he can reach me.

Great Portable charger This is my third portable charger From tzumi and they work Great!