Anker Nano Power Bank,5,000mAh Portable Charger, Built-in USB-C Connector | 5,000mAh 22.5W Portable Charger for iPhone 17 / 16 / 15 Series, Galaxy S23 / S22 Series, iPad Pro / Air, AirPods, and More

I’ve got larger power banks (in all senses of the word), but this is the one I reach for when I’m going to be out for a long day using my phone intensively, and I want to make sure my battery doesn’t get too low. It’s small and lightweight, and it’s easy to hold when I’m holding my phone. I get a little less than a full charge from it, but that’s plenty to keep me in the safe zone. It also provides a surprisingly fast charge, so it’s easy to top off my phone quickly. I tried a MagSafe charger from another brand, but it was bulkier, slower, heavier, and more awkward to hold even though it clung to the back of my phone. I choose this one every time.

Absolutely love this thing, I've had it for over a year now and it has held up spectacularly well. I mainly used it for days when I went on Pokemon Go but it quickly turned into a must-have in my every day bag. It charges quick, tops up the phone perfectly while letting me still use the phone, and comes in clutch with my iPad mini too in case I forgot to charge it before the gym! It doesn't add much weight to my bag nor is it uncomfortable to hold my phone while it's attached. Of course it makes it a little bottom heavy but the tradeoff is worth it while it charges. 10/10 recommend. I got the purple one and it matches pretty perfectly with my Galaxy Fold 8 in lavender as well, in case that matters :)

I'm impressed. I have a 10-year-old Samsung Galaxy S8 (no shame) it works great and this helps keep it charged. It's slightly larger than the last one I had, but the point of connection seems much stronger (won't fall off easily). It drains it's power pretty fast, one full charge = 1 phone recharge but that's okay.

​The built-in USB-C connector makes it super convenient with no tangled cables to drag around. It’s the perfect backup battery for quickly topping off my phone or any other USB-C gear on the go. ​The only small drawback is that it tops out at about a 72% charge if my phone is completely dead at 0%. A full 100% charge would be nice, but honestly, that’s more on me for letting my phone drain completely. For its compact size and convenience, I can't complain at all. Absolutely worth it

I see a bunch of one-star reviews, mostly from people who seem confused about battery capacity, energy, power, voltage, current, etc. People complain that this little pocket-size battery won’t fully charge their iPad. That’s like buying a little one-gallon gasoline can for emergencies, and then complaining that it when you poured it into your truck’s empty gasoline tank it didn’t fill the tank all the way to the top. The cell inside the Anker Nano Power Bank is advertised as having a capacity of 5000 mAh. That means the cell can (for example) supply 5 A for one hour, or 2.5 A for two hours, or 1 A for five hours. Battery engineers like talking about mAh because it is useful for their circuit designs, but for the rest of us it’s not very useful, because knowing the energy in 5000 mAh depends on knowing what voltage we are talking about. For end users, it is more useful to compare batteries based on the energy they store rather than the amount of current they use to deliver that energy. So that means talking about watt-hours (Wh) instead of mAh. For this battery the cell voltage is about 3.6 V, so 5000 mAh gives you 18 Wh. But phones aren’t designed to take power at 3.6 V. Phones require 5 V (or higher). Voltage conversion circuitry is not perfectly efficient. The text on the battery itself claims, “2600 mAh @ 5V x 2.4 A,” which means it can deliver 2.6 x 5 = 13 Wh of energy. This means that the voltage conversion circuitry inside the Anker Nano is about 72% efficient, so the 18 Wh at 3.6 V becomes 13 Wh at 5V (28% of the energy is wasted as heat). In practice, measuring a couple of Anker Nano Power Banks using a USB energy meter, I found they actually deliver 12 Wh (2.4 A @ 5V for one hour). 12 Wh is close to the 13 Wh that Anker claims, but not quite. My iPhone 15 Pro Max has a battery capacity of 17.32 Wh. Charging a battery is also not perfectly efficient — charging makes your phone get warm, and that heat is more wasted energy. If we assume that battery charging is also 72% efficient, then the 12 Wh from the Anker Nano becomes 8.64 Wh in the phone battery, or about half of the my iPhone 15 Pro Max battery capacity. In my experience the Anker Nano does indeed charge my phone from empty to around 50%. Because the Anker Nano supports USB C voltage negotiation, phones that support higher voltages can request up to 10V, allowing the Anker Nano supply up to 22 W for faster charging than a normal USB 5 V supply. The Anker Nano Power Bank is great for unplanned situations where you unexpectedly find your phone battery is drained. The Anker Nano is a small battery that easily fits in a pocket or a bag, and you don’t need to remember to carry a cable with it, because the built-in USB C plug connects directly to the device being charged. If you prefer to use a cable, it also has a USB C socket for that. Last year at the end of a day of skiing I found myself trapped for two hours in a broken-down gondola with four other people. All of their phone batteries were drained, and they were concerned about how they could tell their friends where they were. I pulled the little Anker Nano out of my pocket and passed it around. Within a few minutes everyone had charged their phone 10-15%, enough to call their friends and let them know what was happening.

Compact and convenient!! Compact size makes it easy to carry. Built in plug that folds into the device can be used to directly recharge the device or charge your other device. Also included is a charging cord. Real winner!!

Probably a good charger, I’ve used this brand of power banks before and loved them so I was excited for this one, however it arrived and I realized it won’t work if I have my phone case on. Mine is one of the thinner rubber type otterbox style cases and the piece that goes into the port on the phone is not long enough to reach through my case. Maybe one of those super slim cases it might work with but not any of the cases that actually protect your phone. So I have to return it for something else. I can’t take my whole case apart just to charge my phone when I’m on the go. Otherwise it seems really well made and compact.

UPDATE: I've changed my review from 2 stars to 4 stars. Anker seems to be a legitimate honest copy -- they contacted me shortly after my review and offered to refund my money back. They seem to care about their customers, which is a rare thing nowadays with most other companies. So A+ on the customer service! It appears the item I received had a faulty battery. Since Anker stands by their product, and communicates back with the buyer and is honest, I wouldn't hesitate to try buying from this company again. It seems I was one of the rare 3 or 4 people out of a thousand to get a faulty battery. I guess it wasn't my day. OLD: I tested the “Anker Nano Power Bank with built in USB-C connector” and the results were not impressive at all. However, it's possible this maybe because I got a bad charger. Here's what my test showed: Using the power bank charged fully to 100%, I plugged the Anker power bank into my phone. My phone has a 5000mah capacity battery – the same amount of power that Anker claims the Nano can provide. The power bank charged exactly 1 hour and 8 minutes before it died at 0%. My phone was at 27% battery life before charging. After charging my phone with the Anker Nano, it was only able to get my phones battery up to 91% from 27%. So, that’s 27% to 91%. That means this Anker Nano power bank only provided 64% of charge... Doing the math, that means that this is either a bad product; there’s been some false claims, or I received a half functioning dud with a bad battery If the Anker Nano I received isn’t a dud, then that means this power bank is only capable of 3200mah and not the 5000mah power Anker claims or advertises. However, I understand most power banks will be about 10 to 15% off from the mah power that manufactures claim. But since the Anker Nano could only provide my 5000mah phone with 64% juice, that equals out to 36% deficiency in it’s mah power claims. That’s pretty high seeming this is suppose to be a well known and trusted top company. So overall, I’m not impressed at all and feel a little cheated after testing it out. There are several other brand options I could've choose from in around the same price range, so I’m not feeling certain I made the right choice and feel pretty dissapointed. PROS: -It’s compact. It looks nice. CONS: -1 hour and 8 minutes charge time before power bank dies. -Provides only 64% juice to a 5000mah phone battery before it dies. -Doing the math, 64% = 3200mah of power, not 5000mah of power as described by Anker’s description. (...however, it is possible mine may be a dud??) Conclusion: I plan to test some more Anker and other branded products in the future, and I will update once my comparison is complete. I am still searching for a lightweight charging option that works with at least 80% efficiency, as most good power banks do.

Very handy for charging on the go. Fast

Parece que foi feito pra mim, era exatamente o que eu precisava! Um powerbank pequeno o suficiente pra caber tranquilamente no bolso da calça e com carga rápida (tanto fornecendo pro celular quanto carregando na tomada). E ainda de quebra nem precisa de cabo, que o conector já vem embutido. Simplesmente maravilhoso!

Działa świetnie, jest bardzo lekki i mały jak na powerbank. Szybko ładuje i bez problemu można korzystać z telefonu, gdy jest podłączony. Polecam!"

Very happy with my Nano power bank, it’s small and you can take it every where with you

Excellent powerbank very compact and light weight enough juice for day to day life