Portable Charger, 6000mAh for iPhone 15 16 Power Bank, USB-C Portable Phone Charger with Fast Charging (20W), Mini Battery Pack for iPhone 15 Pro/15 Plus/15 Promax/Samsung/Huawei Andriod - White

This little gem is perfect for giving your phone battery a fast boost. It charged my Galaxy S21 from 40% to 60% in 10 minutes, then 60% to 80% in another 15 minutes and still had 60% left on the display.* It weighs only 3.4 oz, so it's ideal to carry in your purse or day pack in case your phone gets low.Recharging the pack itself from zero to 100% took 82 minutes - pretty fast IMO.I'm happy with its capacity. It has just enough juice to give my S21 one full charge, from 0% to 100% (but don't let it get that low).**I am concerned about whether it will hold a charge. The procedure to turn it off completely suggests that this might be an issue. And when it's needed, finding a power source to turn it on again might be a problem.It's not for charging your phone more than once, so ignore the complaints from reviewers who think it should. No pack advertised as 5000 mAh or 6000 mAh will. If that's what you want, lug around a heavier power pack with more capacity.But this one is light enough to carry around, fast enough to provide a quick boost, and has enough capacity for a full recharge. I like it.================Note: The S21 fast charges at 9v. Speed and efficiency may differ for phones that charge at 12v.* The phone slows its charging above 60%, and slows more above 80%. A full charge from 40% took 51 minutes.** Details for my fellow numbers geeks:Advertised mAh are almost always inflated. This pack advertises 6000 mAh, which I never believed. Arguably the "capacity" could be what it takes to charge the pack from the wall charger, which I measured at 5157 mAh. That's more than the 5000 mAh that similarly sized and priced packs advertise. I'm happy with that.What the pack actually delivered to my phone was 3928 mAh, which is close to the nominal phone battery capacity of 4000 mAh. I'm happy with that. And it may well have a little more capacity than most similar packs.For the engineers - I measure in mWh and convert to mAh, assuming 3.7v which is how battery capacity is advertised. To charge the phone from 40% to 100%, the pack delivered 8720 mWh at the USB connector, coincidentally using 60% of the pack's capacity according to its display. Extrapolating gives a total usable pack capacity of (8740 mWh / 60%) / 3.7v, or 3928 mAh.

This is an update. Originally purchased 2 last year. One of the best purchases I’ve made in this category - excellent functionality and value for my money. They are my go-to especially on-the-go. Portable, lightweight, easy to use. Also, used during a 3-day power outage in my area last year. On return flight 2 weeks ago, got diverted just before landing due to fog. Getting return trip figured out in a timely manner was chaos. I simply reached into my personal bag, pulled one charger out and charged my iphone within the hour. The convenience was anxiety settling. Plan on getting a third one for upcoming major outing.

Nice and compact, fits easily in my bag. Charges quickly and dispenses the charge to my phone easily. Very useful to take on trips.

I’ve been using this portable charger for a while now, and it’s honestly one of the best I’ve owned. It’s compact and lightweight, making it super easy to carry around in my bag or pocket. The charging speed is impressive — it powers up my devices quickly, and the battery capacity is more than enough to get me through a busy day.I also love the sleek design and durable build. It’s saved me multiple times when I was low on battery while traveling or at work. Definitely a must-have for anyone on the go. Highly recommend this portable charger if you’re looking for reliability and style in one!

Perfect on-the-go charger for my iPhone 16E. Fast charging, and space conscious. I do not need extra cords in the travel bag with this device!The charger itself recharges fairly quickly and seems to hold the charge well thus far. It is there when I need it.A little heavy but about what I would expect.Very happy with these!

This portable charger is awesome! It's small and lightweight, so I can easily carry it in my backpack. It charges my phone really fast, which is perfect for when I'm on the go. I love that it has a fast-charging feature, so I don't have to wait forever for my phone to get back to full power. Plus, it looks pretty cool too.

The battery does die quickly and it is a bit wobbly on your phone but it helps charge your phone as advertised!

I like the size and digital display, it fits easily in a small purse or jacket pocket. Womens jeans pockets not so much. With a case on its also the exact width of my S23 Ultra which I really liked. It also didn't over heat, it did get warm but not hot.Cons: Even fully charged it only took my phone from 10% to 65%. I also noticed that if I used my phone (simple browsing no audio or video) while plugged in that it slowed the charge down to a crawl so it's not particularly powerful.Overall, yes it did charge my phone and will get it out of the red as long as I'm careful to keep it fully charged so that it has enough juice for the next time I need it but I feel like I need to baby it because I was really hopeing to get 2 or 3 full uses out of it before I had to recharge it and that it would charge much faster.... so it's not really what I was looking for. But if your looking for something small that will eventually get your phone out of battery saver mode this works ok.