Slow support The original power bank had a defective output. While a replacement was shipped quickly it arrived completely defective. It will not charge. I have made multiple attempts to contact and they still refuse to respond. ** Updated - Support finally reached out and sent a third unit that works fine.

Super rank replacement I bought a zendure supertank power bank via amazon in Nov 22. I began experiencing issues in Jun 23 and contacted their customer service department directly to enquire if my power bank was still under warranty. Grace Huang took my query and resolved within a week. I received a brand new replacement power bank within two weeks. At this point I would like to say that zendure brand of power bank are extremely durable and reliable. My family have three in total with two being almost 4 years old with no problems. Thanks Grace for your help, much appreciated, Neville.

these devices are fine until you need… these devices are fine until you need them, they require constant management else they run into a firmware problem and them whatever was plugged into them like a refrigerator is no longer backed up, no warning nothing. unless you can afford to constantly monitor the device, you cannot rely on it to just "be dumb" until the firmware is updated. by time this happens its out of warranty. also currently cannot explain to anyone how it will not charge over the amp demand in ac wall mode. no one would take the time to understand that just plugging it into the 120v ac outlet isn't good enough for it to be a backup battery in ups mode. it still requires a 12vdc source to provide additional charge over the ac demand it may currently need. in short fine for someone who will charge it and use it as a massive cell phone booster battery, no someone who needs it to be an uninterrupted power supply

I am at my wits end with this company I am at my wits end with this company. I have been waiting over six months (yep, six months) to get the unit returned as it doesn't work. Jamie J emails constantly to say your return label is being generated - nothing transpires. The unit is next to useless. My fridge and freezer have defrosted twice because the thing either switches itself off after firmware issues or runs out of charge with no warning. The battery capacity is useless. My Jackery has half the so-called capacity but lasts twice as long. In short, I'm happy to be patient when a new company has issues but this company treats customers like mugs and ignores issues.

Hi Zendure I bought 3000 euro worth of… Update At least they respond to reviews. I wrote the better buisness buro and the handels register. Within a day of writing i received word they would refund me. Five days later the refund was at my bank. So they are listenning. Would have simply been so much better if they had been listenning the four months before. But in the end I went with Bluetti...in the time it took to get my refund I have a new system, great service and lights...finally. I will give zendure another star for trying to solve it. But cmon guys. You know better. Original review Hi Zendure I bought 3000 euro worth of your product and STILL have not received it. It was supposed to be delivered in November!!!! I write, I call, and always I am told that you have no idea when I will get my order. This is truly unacceptable. I surely can wait a bit but our build is now waiting only for this product so we can HAVE LIGHTS!!!!!! please, I wish some customer support and my product. AND that you actually have customer support - your telephone lines are just recordings, your tickets are just autoresponders- I am hoping this will reach someone. I was excited and hopeful about this company and truly sad to see it might be a BIG SCAM. really hopeing not so please @ZENDURE - please fix this, send me my paid for product - respond to my inquiries, Fix your support so that it actually works instead of autoresponders and no people - Please prove me wrong!