I bought this OKZU 5V 2A Power Bank specifically to use with heated stadium seats, and it worked great. The size is small and compact, making it easy to tuck into a pocket or bag without being bulky. It powered the heated seats reliably and still had enough capacity to charge a cell phone at the same time, which was a big plus. Charging speed was solid, and I didn’t notice any overheating or performance issues during use. Overall, this is a practical, dependable power bank that does exactly what it’s supposed to do. Great option if you need portable power for heated gear or everyday phone charging. Read more
Recently I lost my power bank onboard a flight. I was looking for a replacement that is lightweight and could handle at least 2 charge cycle for a combination of my phone collections, Pixel 3 and iPhone 8+, 6s and Oppo. First I bought Anker Powercore 20100, it was kind of bulky and somehow it stops in the middle of charges with no reason. I have to push the button on the side to start again. Also, Oppo charged very very slow before it stopped. No fast charge for Pixel. So the next thing, I ordered: Charmast 20000 PD/QC 3.0. I found it lighter than Anker, however, this one ran 3 charge cycle and got down to 50%. Oppo charged better than Anker though. I was thinking of keeping Charmast, since its lighter than Anker and smaller. But then I came to see Okzu 10000 has the same QC 3.0 and PD. So I got this one too to check out. Okzu has worked out the best so far! The unit is so light. Smaller than iPhone, sleek design and as of writing this, I am running my 4th charge cycle. I charged Pixel 3XL twice, one from 38% and another from 47% and it fast charged like magic. I charged Oppo, and it fully charged from 17% and then the unit shutdown itself. Then I charged iPhone 6s from 19% to 100% in about 93 min. And the interesting thing is, it still shows 2 led lights. I guess for <$20 this is the best one worked for me so far. I am going to return both Anker and Charmast. I am leaving a 5 star for this now, and I will adjust the ratings up or down based on how this unit performs over the next couple of months. Read more
Fast charging, works great Read more
Used with heated bleacher chair. So far power use for chair is about 30 percent discharge after almost 4 hours of constant use. Also charges wifes cell. Easy plug and play. Works as well as much costlier units. Read more
Sent back because the item I purchased it for didn’t work Read more
I have recharged my Pixel2 4 times so far and still have 1 LED (of 4) remaining. Very happy as I will typically have 5 days between resupply on the trail but on the trail, I will have my phone in Airplane Mode and so less battery use per day, so I will have no problems making it greater than 5 days. Great price too, so will buy multiple batteries for successive maildrops, each with a recharged 10000 mAh OKZU battery enclosed with resupply food. Edit- Days later, tried to recharge my phone again. Only 1 LED lit on the OKZU. Phone did not charge at all but the battery began showing 2 LEDs lit. Something unexpected going on. So I recharged my OKZU to full power (4 lights) and then tried to recharge my Pixel2. The power bank would charge my phone using the first USB port to USB-C on my phone. Tried the other USB port. After hrs, phone had not recharged even 1%, despite the Pixel2 screen displaying "Charging" and an estimated "19 hrs to full charge". I reviewed the simple instruction manual. Nothing in it about touching the On-Off button. All 4 LEDs became lit on the OKZU upon connecting the battery to my phone, ostensibly showing the OKZU turned on on connection. What's wrong? I pressed the battery's On-Off button and only then did the phone actually start charging at about 1.5% per minute with a new estimated time to charge of 40 minutes. So even if the OKZU's LEDs light up upon connection with a phone, it appears you must press the On-Off button for it to actually charge the phone. Additionally, simply connecting to the Pixel2 showed the Pixel2 "charging" but at a very slow rate (19 hrs). It took pressing the On-Off button to increase the rate of charge from 19 hrs to 40 min. That is confusing and I don't recall ever pressing that button the first 3 times I recharged my phone. Will keep you updated as I'm a little concerned about being out in the backcountry, crawling into my tent at the end of a long day of hiking, connecting my Pixel2 to the OKZU, only to find my Pixel2 had not recharged overnight. Read more
The battery works for many different things . Read more
Battery got bulging and unsafe at 4 years. I got it late october 2021, I'm writing this early november 2025. DO NOT BUY THIS BATTERY Read more
