Nano Power Bank,5,000mAh Portable Charger, Built-in USB-C Connector

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.

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.

I only get one full phone charge from this device, but given how conveniently small it is it's now my go to charger when I'm out for the day and know I'll be using my phone a lot.

I really liked the small design of this charger. It was easy to slip in a pocket or a bag. The charger would recharge my iPhone so quick. My only issue was that the charger itself took a long time to charge.

I purchased this to use with my Nintendo Switch2; it works great! It charges my switch while I'm playing it. It's very light and fits in my pocket or bag. I really like that the port is bendable and I can use it on the top or bottom of my device. It's a massive bonus that it stays up on it's own and doesn't have a long, dangling chord to mess with. It charges everything really really fast. My only complaint is capacity; it runs out of charge very quickly. It essentially quickly super charges the device and then its dies. The price was really reasonable so I purchased two.

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.

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.

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 :)

Very handy for charging on the go. Fast

Tenho um Poco X7 Pro, essa bateria carregou de 0% → 60% em situação ideal, sem mexer no celular... Usando ele como é pensado pra ser usado, deve carregar perto de 50%, o carregamento que ele proporciona é rápido, mesmo com você mexendo da pra ver que a bateria sobe, não fica estacionada como outras baterias de carregamento mega lento... A fixação é boa, usando normalmente não deve cair nunca, mas como uso o celular no suporte na moto, precisei fazer uma gambiarra na capinha do celular como uma espécie de "cinto de segurança" pra poder usar ela mesmo andando de moto... Eu uso o celular literalmente o tempo todo, trabalho usando o celular e preciso sempre de estar com o brilho no maximo pois uso o celular no sol da manhã entre 8h e 15h na moto, e com bluetooth e 5g sempre ligados... E com essa bateria consigo usar o celular mais de 12 horas, mesmo depois de chegar em casa ainda consigo usar o celular de maneira mais leve até a hora de dormir, quando ponho tudo pra carregar... Sinceramente, me atende muito bem, pra mim serviu perfeitamente pro que eu precisava, fazer a bateria do celular durar o dia todo rodando fazendo entregas, é extremamente compacto relativamente leve, levo no meu bolso quando não estou usando e não me incomoda nenhum pouco, nota 10/10, não tenho pontos a reclamar, valeu cada centavo.

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

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

for quick charching light devices