charmast Portable Charger, Slim Battery Pack 26800mAh, 15W Fast Charging Thin Power Bank, Travel Essentials Compatible with iPhone 16/16 Pro/16 Pro Max, iPhone15/14/13/12 Series, iPad, Samsung etcClimatePartner certified

This powerbank was crucial to complete my 2023 PCT thru-hike. It lasted through many charges in many adverse conditions. I used it for my Garmin inReach mini-2, Garmin Fenix watch, Petzl head lamp, and Samsung 17 phone. No compatibility issues with this powerbank.The powerbank lasted for 3 days avg charging each as needed. Phone takes the most juice and must be monitored when multi-charging at the same time (power goes quickly). My Garmin devices were most important and this keeps these small devices (outside the phone) charged for over a couple weeks easy, probably longer.My complaints are the length of time to charge the powerbank and the power meter. Wow, it takes forever man, like overnight charging lol. Definitely need 4-6 hours to feel confident. The four dots make it difficult to know exactly how much juice remains. It's a "learn as you go" lol.One final note: I was fortunate to find power at a shack in Yosemite the last week of October 2023. I was able to charge the powerbank to 3 dots before my final push South through the High Sierras. I stopped charging my phone 2 days in and made it 4-5 more days charging my GPS devices and headlamp. I finished the PCT with an exhausted powerbank and working devices. This powerbank holds a charge well. I currently use the one from the PCT and just bought another of the same model. HTH.

Why did you pick this product vs others?:I really enjoy having this charger. It saved me during a camping trip and was able to charge 2 iPhones from 0% with no issues. One thing I love is how slim it is. It fits perfectly into a pocket or backpack and doesn’t take up much space. For travel, that makes a huge difference. Definitely recommend.

It's working properly and charged my mobile 100% in One and half hour. This is first charging and I am satisfied. Will give my review if changes in performance.

I bought this device after I started using my mobile phone more, including professionally, and it became important to have backup power on the go or during power outages, etc. I chose this produce both because of its high capacity and the form factor, which looked like it was probably cell-phone sized, allowing it to fit neatly behind my mobile device.The good:On the power front, it didn't disappoint - while charging this up, or while using it to charge your device, it has four LED lights indicating charge level, and it seems like each of these is good for a full cell phone charge from 0% (using a modern Google Pixel phone). So when fully charged, you can absolutely use this for your phone with no wall power for several days.It's also pleasantly thin and simple in design. It does what it's supposed to do very well and doesn't overwhelm you with unnecessary features. Using this device is essentially stress-free.The bad:I rate this overall at 4 stars because the form factor is somewhat large. Although thin, it is longer and wider than I'd like. For some people it may be fine, there are phones the size of this, but if you're like me then some phones are just too big, more closely resembling a small tablet than a phone. This is about the size of those phones. So it does not match the form factor of my phone as I'd hoped - it is not pocket size at all, and that will impact how I can travel with it. Still, knowing this I would buy it again because it works well and I know of no other better device at a smaller form factor right now.The other issue I had which was also minor has to do with the charging cables it comes with: one is the old (large) standard USB to micro USB, and the other is the old (large) standard USB to type-C. They're quite short and ideal for using this power bank to charge your device. Sadly, they're less than ideal for charging the power bank itself. It would have been good if it came with a type-c to type-c cable, since that is now essentially the new standard cable connector type, and it would be nice if that cable was a little longer than the others.Conclusion:While my pros are shorter than my cons, make no mistake this is a great device. It's just that it's easier to explain what's good about it and it takes more words to explain the relatively minor areas in which it could be improved. I would suggest this power bank for a friend or relative, and would buy again if I needed another for some reason (if four days or so of power weren't enough).

great power bank, works well and can charge multiple devices at a time. have been using it for a few months with no problems

Ready to use on arrival with a 75% charge. Comes with a versatile array of connectors for most any device. Recharging needs a bit of patience, unless you add a 15W or 20W fast charging block to minimize the recharging time. Recently lost the first Charmast I purchased in 2021, and did not hesitate to order the same. Company has restyled the power bank with an option for a smaller unit that can fit comfortably in your hand, pocket or an accessory case sleeve. So dependable that I buy fewer batteries. If batteries drainout it is a saving grace to grab the Charmast and hardly lose a beat. Warranty and service for 24 months. Strongly recommend this power bank.