Anker Power Bank, 20W Portable Charger with USB-C Fast

Anker Power Bank, 20W Portable Charger with USB-C Fast Charging, 335 (PowerCore 20K), Works for iPhone 13/12 Series, Samsung, iPad Pro, AirPods, Apple Watch, and More.


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Trickle Charging Mode

Get optimized charging to low-power devices such as earphones, Bluetooth speakers, and other accessories.

Wide Compatibility

Works flawlessly with a wide range of mobile devices including phones, tablets, and more.

Comprehensive Safety

Anker’s MultiProtect safety system combines advanced temperature control, overcharge protection, short-circuit protection, and a fireproof casing to ensure complete protection for you and your devices.

Model: A1288

Anker 335 Power Bank (PowerCore 20K)

One-Stop Charging for Multiple Devices

Super Huge Capacity

Conveniently power all your essential devices wherever you go thanks to the 20,000mAh battery capacity. Charge an iPhone 13 over 4 times or a Galaxy S22 Ultra more than 3 times.

Charge 3 Devices At Once

Charge your phone, tablet, and earbuds or Apple Watch simultaneously from one power bank.

Designed for Speed

20W fast charging lets you charge an iPhone 13 to 50% in 37 minutes.

Superior Safety

Anker’s exclusive MultiProtect safety technology provides complete protection for you and your devices.

Compatibility

Phones:

iPhone 13 / 13 Pro / 13 Pro Max / 13 Mini

iPhone 12 / 12 Pro / 12 Pro Max / 12 Mini

Samsung S21

Samsung S22

Google Pixel 5 / 6

Tablet:

iPad 9th Gen

Wireless Earbuds:

AirPods Pro / 3 (with wireless charging case)

Apple Watch:

Apple Watch Series 5 and 7

Notes:

  1. USB-C to Lightning cable not included.
  2. Apple Watch cable not included.
  3. Not compatible with MacBook Pro 13″ (2019) and MacBook Pro 16″.

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Charging Technology Power Delivery PowerIQ Power Delivery Power Delivery PowerCore
Output Ports 1xUSB-C 2xUSB-A 1xUSB-A 1xUSB-C 1xUSB-A 1xUSB-C 1xUSB-C 1xUSB-C
Cable included USB-A to USB-C cable Micro USB cable USB-C to USB-C cable USB-C to USB-C cable USB-C to USB-C cable USB-C to USB-C cable
Size 16.64 x 8.27 x 2.35 cm 14.9 x 6.8 x 1.4 cm 14.95 x 6.85 x 1.45 cm 10.5 x 6.65 x 1.28 cm 10.7 x 6.65 x 1.81 cm 9.3 x 6.25 x 1.6 cm
Weight 462.66g 212.6g 212.6g 140g 217g 131.54g


Dimensions: 16.64 x 8.27 x 2.35 cm; 462.66 Grams
Model: A1288011
Batteries Included: 1 Lithium Polymer batteries required. (included)
Manufacture: Anker
Dimensions: 16.64 x 8.27 x 2.35 cm; 462.66 Grams
Origin: China

51 Responses

  1. Anonymous says:

     United Kingdom

    Golden Review Award: 2 From Our UsersGreat battery charger, hold the charge long and you can get numerous charges out of it. The only slight negative is that it is a little bit heavy and a little bit bulky so if you’re carrying it around it definitely adds weigh

  2. Jarret C. says:

     United Kingdom

    I bought this product to take on a 7 day hike,

    It performed exceptionally, charging my iPhone multiple times on one charge.

    It is sleek and looks very good, of course it is rather heavy but that’s natural for a strong power bank.

    Very impressive and worth the investment.

  3. Anonymous says:

     United Kingdom

    I don’t think the charger holds as much power as it states. However it does charge my phone and iPad pro quite quickly. Bought as a replacement for an older Anker charger, old one I could easily get over a week out of the charge but it started charging slower. This new charger may last 2 days at most with an upto date phone.

  4. BettyRsgbhkycci says:

     United Kingdom

    Got around 4 or 5 charges of my iPhone 14 pro max with this and it supports fast charging. It was the best decent capacity power bank for that price point, I’ve paid for similarly priced power banks in the past that don’t support fast charging nor have usb c. This one had both. To note, previous power banks were also by Anker. So out of all Anker power banks I’d recommend this one for that price point.

  5. ImogenWiggins says:

     United Kingdom

    Golden Review Award: 2 From Our UsersAdmittedly this is the first power bank I’ve ever used or purchased so I don’t have comparison. But I found this to be great and perfect for what I needed it for. Took this on four day camping trip to keep my phone and headphones fully charged and it worked up until last minute.

  6. Anonymous says:

     United Kingdom

    10000mah!!!!
    This is the only real fast charge power bank I can rely on.
    The battery last long.
    As a driver, having 2 phones all the time, this helps me a lot having another source of power for my phones to keep them running.
    It’s awesome. Recommend

    5.0 out of 5 stars FAST CHARGE power bank by Anke

  7. Emma Christensen says:

     United Kingdom

    The Anker Power Bank 20W is an impressive portable charger. With its fast charging speed, compact design, large capacity, and safety features, it’s a reliable companion for keeping your devices powered on the go. Highly recommended!

  8. Anonymous says:

     United Kingdom

    Great product. We used this while out cycling using gps apps on our phones and never had to worry about our phones dying in the middle of nowhere. Wouldn’t travel without it.

  9. Anonymous says:

     United Kingdom

    This powerbank is really convenient to have as it has high capacity but it’s a bit heavy. I used it to charge two mobile phones during an event and I still had about 50% left by end of the day. Worth the money.

  10. MelinaWoods says:

     United Kingdom

    The capacity and power to charge multiple items is very useful. The item itself charged reasonably quickly and has held its charge well even after charging several phones a couple of times each.
    The only niggle is that the usb port (on my item) was a little tight and also a little fiddley sometimes to get the usb cable to seat properly.
    Other than that great power bank.

  11. Anonymous says:

     United Kingdom

    Golden Review Award: 2 From Our UsersI bought a different from this brand one with similar specs before that had a case unfortunately this one doesn’t come with one and because of how big and heavy it is it’s really easy to get scratches and damages on i

  12. Anonymous says:

     United Kingdom

    Golden Review Award: 3 From Our UsersTravelling overseas the following day and unsure of power availability at my destination for my Z3 Flip, so I looked at the ratings and opted for this charger.
    However, in hindsight I should not have purchased this battery for travelling, as it weighs a staggering 462.66g/16.3oz’s and is way too bulky, so not an ideal choice where weight is a key factor.

  13. Anonymous says:

     United Kingdom

    Really good power bank which works really well. The power bank shows how full it is by number of lit dots. It has enough power to recharge my iPhone three times over.

  14. Anonymous says:

     United States 🇺🇸

    Perfect travel company for iPhone only. Not enough power capacity for iPad or laptop.

  15. Anonymous says:

     United States 🇺🇸

    Es bastante grande! pesa casi medio kilo Pero super recomendable y carga varias veces el celula

  16. AlejandroLamar says:

     Germany 🇩🇪

    Super tolle Powerbank die auch optisch was hermacht. Allerdings sehr schwer und eher was fr Reisen oder fr groe Handtaschen. Mein iPhone 13 Pro kann 4x damit aufgeladen werden. Gerne wieder.

  17. AidaMonson says:

     Germany 🇩🇪

    Die Powerbank habe ich mir fr eine mehrtgige Schulung gekauft. Sie ldt das Handy (iphone13 Pro) zgig auf. Ich wrde genau diese wieder kaufen.

  18. Anonymous says:

     United States 🇺🇸

    Great storage battery pack for long trips with no access to AC.
    Great for flight travel, especially International on long trips.
    Th dual USB jacks allow you to charge multiple devices.
    Be sure to fully charge until you get all 4 LEDs to lite
    The Slow Charging Mode is great for smaller battery items.

    ANKER Excellent Portable Battery Pack

  19. RosellaW44 says:

     Germany 🇩🇪

    Ich habe einen Stern abgezogen weil sie nicht unbedingt fr die Handtasche geeignet ist. Sie ist etwas schwer und kompakt. Das zeugt aber auch fr die Qualitt. Ich wrde sie wieder kaufen.

  20. EdenPaspalis says:

     United States 🇺🇸

    My son recommended this for me as the only really reliable brand of back up battery power. It works great and fast. My only concern is, I bought it to take on a trip to recharge my phone that I will be using as my camera and this battery weighs a ton. It will completely charge my S22Ultra two full charges, which is great, but I have to lug this heavy thing around with me…. I may look for a smaller one that won’t weigh as much. I may not even need it at all, as my phone’s battery is pretty good. I wonder if it would charge a laptop?…

  21. Anonymous says:

     United States 🇺🇸

    Golden Review Award: 3 From Our UsersThis came right in time where my area lost power recently, and this thing is handy to help us power out smartphones through the night.

    One thing I will say is on the advertised 20k mah, I am not sure if it’s the true capacity. Reason I said that because I charged full the powerbank which shows 4 small led means fully charged. During that night, I charged up my s22 ultra and wife’s pixel 7 pro, it went down to 1 led which means it used up almost 75% of the capacity. I have no way to validate this though

  22. KatrinaPennell says:

     Germany 🇩🇪

    Sehr ntzlich, falls der Strom ausfallen wrde, kann ich mein Handy, Tablet und Fitness-Armband trotzdem laden. Erfahrung mit dem Aufladen per Solarenergie habe ich noch nicht.

  23. Anonymous says:

     Germany 🇩🇪

    Von mir eine klare Kaufempfehlung. Ich kann mit dieser Powerbank problemlos mein Handy und Tablett gleichzeitig unterwegs laden. Auch von der Aufladegeschwindigkeit kann man sich nicht beschweren. Voll aufgeladen ist die Powerbank in 2-3h (je nach Netzteil welches man verwendet) und auch die Gerte selbst sich recht flott geladen. Hier kommt es natrlich dann auch drauf an ob man ein Gert alleine mit Energie versorgt oder zwei gleichzeitig.

  24. Anonymous says:

     United States 🇺🇸

    This unit is powerful. I can usually get four full charges for my iPhone 12 pro. Sometimes a little bit more. It’s great for long plane flights, the most long-haul planes these days have USB at the seats. However, I don’t like to fly without this, in case, the onboard system is broken. It’s happened to me. The downside of this device is that it’s heavy, so I don’t see it as a daily use to keep in my backpack.

  25. SusannaClaude says:

     Germany 🇩🇪

    Da es ein Weihnachtsgeschenk ist kann ich nur schtzen, aber bis jetzt hat immer noch alles gepasst!
    Liebe Gre aus der Steiermark

  26. Anonymous says:

     Italy 🇮🇹

    Ancora una volta anker mi ha sbalordito.
    Powerbank della madonna! Consiglio a tutti

  27. IndiaSouth says:

     United Kingdom

    I bought this to charge my Samsung S20+ at work. It’s great and fast too. Just a bit heavy but that’s to be expected though. I love it. Thank you.

  28. Anonymous says:

     Italy

    me lo aspettavo un p pi contenuto avendo preso per la mia ragazza il modello precedente l’anno scorso (sempre da 20000), mi aspettavo anche ci fosse la custodia. E’ abbastanza grande da trasportabile senza problemi, ricarica in fretta i device.

  29. King01Oxnb says:

     Netherlands 🇳🇱

    Voor de medewerkers van het bedrijf verschillende powerbanks gekocht.
    Deze bevallen het beste.

  30. Ian Evenden says:

     United Kingdom 🇬🇧

    Great battery pack, looks smart, does the job. Double USB charging points. Has long life.

    For the money.. great.

  31. Anonymous says:

     United Kingdom 🇬🇧

    The best thing about this item is it does charge the phone or iPad very quickly and does have enough charge to do the number of items as advertised. Downside is the item itself takes a very long time to charge up to capacity and because it is only one item takes longer than it would’ve taken you to charge the iPads and iPhones.

    it’s also very heavy so although it’s good for a camping trip or work purposes I wouldn’t want to take it as part of my airline luggage or walking trip

  32. Anonymous says:

     Germany

    Golden Review Award: 3 From Our UsersEigentlich bin ich ein echter Anker Fan, doch in diesem Fall ist es eher ernchternd. Ich habe mein recht altes iPad (6th Gen.) nur einmal voll und einmal 2/3 voll bekommen?! Das iPad hat (im NEUZUSTAND!) eine Akkukapazitt von rund 8800 mAh diese hat der Akku nach so vielen Jahren ganz sicher nicht mehr. Ergo, liegt die Kapazitt der PB bei weit unter 20000 mAh!!! Schade, schade, schade !
    Nach meiner Bewertung hat mich der Kundenservice von Anker kontaktiert (sehr freundlich) und mir geschildert, dass solche Akkus immer nur 60-70% reale/verfgbar Kapazitt der angegeben Kapazitt haben (eigentliche Erklrung war etwas ausfhrlicher) und dass dies im Grunde bei allen PBs so ist. Na dann, scheint es eher ein generelles/branchenbliches Werbeproblem” zu sein. Ich erhhe damit meine Wertung, auch wegen des super netten Kundenservice auf vier Sterne.

  33. VaniaL38ykqpv says:

     Italy

    Powerbank buono ma poco pratico ( pi largo del solito) , viene consegnato senza una custodia morbida a sacchetto mentre con altri Anker era presente.
    F il suo lavoro e ha una porta di ricarica rapida.

  34. Anonymous says:

     United Kingdom 🇬🇧

    I decided to buy this one due to its size and yes, it is heavy. However, it is very versatile using the USB A and USB C ports. I even bought a USB C to DC adaptor cable to charge camera batteries whilst I am out in the field, and it does so beautifully. Charges my iPhone rapidly too. Cannot fault this product at all!

  35. Anonymous says:

     Germany

    War sehr zufrieden, habe die Powerbank leider dann verloren beim Party machen aber hey, passiert.

    Finde sie sehr teuer, ich hab sie auch etwas gnstiger bekommen als den aktuellen Preis von 65 der hier verlangt wird aktuell, aber das Produkt selber ist sehr gut.

    Fr den Rucksack und lngere Trips ist diese Powerbank top, fr wilde Nchte oder wenn ich keinen Rucksack mitnehmen mchte nutze ich jetzt den kleineren PowerCore 5k der aufgrund des Preises auch nicht so sehr weh tut wenn man ihn zwei Monate nach kauf verliert und auch absolut ausreichend ist wenn man nur sicher stellen mchte auf dem Heimweg von der Arbeit oder morgens nach hause noch gengend Akku zu haben.

    Fr den Rucksack Use Case bin ich jetzt auf eine grere umgestiegen, ebenfalls von Anker mit mehr Power fr meinen Laptop.

  36. Alex Apatoff says:

     United Kingdom

    This thing is excellent charges my phone about 4 times. Though new modern look is a finger print magnet preferred textured surface. Don’t buy cheap alternatives they don’t last been there seen it done it stick with Anke

  37. Anonymous says:

     United Kingdom 🇬🇧

    Just got it yesterday charged it overnight and today I have tried to charge my phone with the original cable which is omg not good at all and after with another cable I bought from here from amazon. As you can see in the screenshots it would take 5h to charge my phone lol and 1h with another USB cable. Anker you dissapoint me big time as this is my 3rd battery I buy from you guys. I cannot yet tell about battery life but will update in a few days. So far 4 stars because of the crapy usb cable.

    Just got it yesterday

  38. [email protected] Brittany @ The Pistachio Project says:

     United States

    Golden Review Award: 2 From Our UsersTerrible Battery Life!!! Find something else if you’re going to be out all day!!
    I bought this Anker 335 Power Bank because the older ones I have are starting to lose charge quickly. I have been a customer with Anker since about 2015, so all my power banks (I have 8, only because I buy new ones when I travel long periods and forgot to bring one, That’s how much I liked them), usb cables, chargers and power strips are from them, because they are usually reliable. BUT NOT THIS ONE!!! I literally only got 2 charges from this battery and it was fully charged when I left my home. Since I wasn’t expecting this issue, I dispose of the box, now I cannot return it! Very disappointed with Anker on this!!! Guess I’m going back to my older models because they still hold the charge longer than this one. 🙁

    ***Edited: Received Replacement!! Much Better***

    I appreciated Anker quick customer service. They replaced the power bank and it works perfectly. The only issue is that it takes about an hour to be fully charged, but hey we can’t have everything we want right!! lol. So the replacement was sent out, I charged it fully and tested it out and voila! I had about 5 charges! That’s very good in my book! Get yourself one of these!

  39. Anonymous says:

     United Kingdom 🇬🇧

    Golden Review Award: 3 From Our UsersI used to keep my phone gps and light charged on a five day bike packing trip. One charge at home lasted the whole trip.

  40. Anonymous says:

     United Kingdom 🇬🇧

    Golden Review Award: 2 From Our UsersThis company always delivers a heck of wonderful goodies and this power bank is one of the best!! Value for money!!

  41. Anonymous says:

     Italy

    Sono un cliente Anker da anni ormai, ho testato e usato fino allo stremo diverse loro batterie esterne e salvo qualche modello, non ho mai avuto nessun tipo di problema e/o critica negativa.
    Da quando Apple ha introdotto l’ingresso USB-C, ho dovuto riacquistare una nuova batterie esterna, avendo gi predisposto quest’ultimo attacco e ho optato per questo modello, compatibile col mio Iphon 12

    PRO
    – Ricarica di uno /due smartphone abbastanza veloce, a differenza di come riportato in descrizione, la ricarica di due dispositivi CONTEMPORANEAMENTE E’ FATTIBILE E SUPPORTATA, non so se questo possa influire sulle prestazioni future della batteria ma per un’emergenza si pu fare
    – Comodissima la presenza della presa USB C per attenzione! Seppur sono presenti due prese USB CLASSICHE, La ricarica della batteria deve essere fatta sempre dalla presa USB C e non dalla presa USB tradizionale!

    CONTRO
    – Primo difetto o quantomeno una nota triste: Anker sempre attenta ai propri consumatori, ogni scatola di ogni prodotto curata nei dettagli per in questo caso, visto le dimensioni ingombranti e il peso, mi sarei aspettato di trovarci annesso una piccola custodia, anche a sacchetto, dove riporre e magari trasportare questo “mattone” !
    – La ricarica della batteria molto lenta e lunga; personalmente la ricarico con cavetti originali Anker e con un alimentatore a parete sempre della Anker con la tecnologia PowerIQ ma serve a poco, per una ricarica completa, da batteria scarica ci vogliono quasi 20 ore, con la batteria con due/tre palle di carica, impiega una nottata intera quindi sulle 12/16 ore
    – Confermo, come visto anche in altre recensioni, prima del suo acquisto, il suo peso abbastanza sostanzioso, sicuramente in tasca risulter scomodo quindi sconsiglio il suo acquisto se l’uso mirato a tutti i giorni
    – Ok la discreta potenza di ricarica ma oltre al peso, anche le dimensioni sono quasi ingombranti, per il trasporto necessario obbligatoriamente un marsupio o uno zainetto, difficilmente pu entrare comodamente nelle tasche dei pantaloni o di una giacca!
    – La cover frontale della batteria seppur di plastica opaca, ogni riga e ogni sfregamento abrasivo rimane permanente e visibile, quindi se buttate questa batteria nello zaino insieme ad altre cose, magari tagliandi e/o di metallo, avrete una bella sorpresa quando la riprenderete in mano!

    CONCLUSIONI
    La qualit Anker non si discute, sicuramente in questo modello pi funzionale e indicato per chi vuole una power bank per le emergenza, quando ha bisogno di una ricarica veloce al telefono e gli serve subito.
    Oppure da portarsi in vacanza per un paio di giorni massimo, se non si ha la disponibilit di ricaricare i propri apparecchi a una rete di corrente fissa.

    SCONSIGLIATO a chi cerca una batteria esterna da portarsi sempre dietro, il peso e le sue dimensioni non giustificano il suo utilizzo

    Affidabile perché del marchio Anker, prestazioni quasi sotto alla media

  42. Dan Vecellio says:

     United Kingdom

    Initially took ages to fully charge but quickly charged my phone and 2 apple watches during a long haul fligh

  43. Anonymous says:

     United Kingdom 🇬🇧

    Golden Review Award: 3 From Our UsersI like that it has the option of using 2 USB outputs and a fast charge type C connection port, also allows a low power trickle charge setting. A slight downside is you can’t charge the power bank up by mains power and still use to charge a gadget simultaneously, nor can it charge gadgets wirelessly. it weighs 1.02 lbs so some people may find this a tad heavy for travelling but otherwise I would recommend this, so much so that I bought two. Another good point, it is flight friendly (20,000 mah) so can be carried on board.

  44. Anonymous says:

     United Kingdom 🇬🇧

    Thought it was pretty pricey compared to others but it was definitely worth it. You get what you pay for. Slightly bulky also but was able to charge 2 x iPhone 13’s for three days off of it. First time with fully charged phones all the time at a festival.

  45. Anonymous says:

     United Kingdom 🇬🇧

    Not exactly compact as it is bigger than my mobile. If you have an older phone, make sure you have your cable as it only comes with the new connector.

  46. Anonymous says:

     United Kingdom 🇬🇧

    I have had this power bank for slightly over a month and I love it! It charges my tablet and phone twice up to 100% before I need to recharge the power bank. It’s a bit heavy so defo not a pocket thing. Strongly recommend!

  47. Anonymous says:

     Germany

    Golden Review Award: 7 From Our UsersIch war bei Bestellung etwas skeptisch, dass mir die Powerbank eventuell zu schwer/gro wird. Nach dem Sommerurlaub sind nun alle Zweifel weg. Ich wollte eine Powerbank mit Durchhaltevermgen und mit USB-C Port.
    Das Gert ist kein Leichtgewicht und sicher nicht fr alle Situationen perfekt. Als Begleiter fr einen Urlaubstrip oder Stdtereisen, in denen man erst am Ende des Tages wieder Gelegenheit hat, sein Smartphone zu laden, ist diese Powerbank ideal. Im Rucksack fllt das Gewicht auch nicht auf und ich hole sie nur heraus, wenn ich sie bentige.

    Ich lade die Powerbank mit meinem MacBook-Netzteil per USB-C auf und lade mein iPhone ebenfalls per USB-C auf auf Lightning Kabel. Die alten USB-Ports bentige ich gar nicht. So schnell hat mir bisher noch keine Powerbank ein Smartphone aufgeladen, also Schnellladung wird richtig gut untersttzt.
    Dem Gert geht dabei nicht so schnell die Puste aus. Top Qualitt von Anker und ich habe nicht bereut, der Marke treu zu bleiben. Also das ist wirklich eher etwas fr den Powereinsatz. Wenn ich ein eher smartes Gert mchte, das bequem in die Hosentasche passt und mit dem ich mein Handy vielleicht nur 2-3mal am Tag aufladen mchte und keinen Wert auf Schnellladung lege, gibt es bessere Alternativen.

  48. JacksonReinhart says:

     United Kingdom

    Does what it says on the tin – Can’t complain – very happy

  49. John Cotter says:

     United Kingdom

    Bought a few Anker products over the years and each one has been brilliant, really good build quality and very reliable. This battery pack senses the phone being plugged in and charged it very quickly, so far I’ve had 4 full charged of an iPhone 11 Pro Max and still got a third of the battery lef

  50. Zoe McKinnell says:

     United Kingdom 🇬🇧

    Yes it’s big, but it’s also faster at charging than other devices I’ve used. Not one for the pocket but great for everything else!

  51. Anonymous says:

     United Kingdom 🇬🇧

    Golden Review Award: 4 From Our UsersIt’s good, it works, a little bulky to have in a pocket it’s better for longer trips and carrying in a bag.