Black November · reviews open after first deliveries
ONDO 20K Magnetic Power Bank, 20,000mAh
A 20,000mAh magnetic power bank that snaps to the back of your phone and charges it at up to 15W without a cable. When you need speed, plug in USB-C for 22.5W. The LED display shows the exact percentage left, so you never guess.
€49.99 Black November price
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What you get
ONDO 20K€49.99
- 20,000 mAh, about 3 phone charges
- Snaps on magnetically, 15 W wireless
- 22.5 W USB-C in and out, plus USB-A
- LED display shows the exact %
Free tracked delivery to Ireland and the EU · 14-day returns · 2-year warranty against faults
Description
A magnetic power bank that stays on the back of your phone. 20,000 mAh of capacity, 22.5 W over USB-C for fast top-ups, 15 W wireless on the magnet, and an LED display so you always know what is left. Four colours.
Technical specifications
Capacity 20,000 mAh (Li-Polymer). Wired output up to 22.5 W (USB-C and USB-A). Wireless output up to 15 W (magnetic). Input 22.5 W USB-C. LED percentage display. Weight and dimensions: published after our own measurement. Manufacturer: NDNNAS, China.
Will it hold on my case?
It holds on phones with a built-in magnetic ring and on magnetic cases. Plain thick cases weaken the hold and the wireless charge; use the cable then.
Shipping & returns
Free tracked delivery to Ireland and the rest of the EU; the delivery window is on the Delivery page. 14 days to return for any reason from the day you receive it, and a 2-year warranty against faults. Read how returns work.
On the goThree charges.
Three charges.
Zero cables.
Snap it on before you leave. The display tells you what is left, the magnet keeps it there, USB-C brings it back to 100% at 22.5 W.
Add to cart
20KmAh capacity
22.5WUSB-C fast charge
15Wmagnetic wireless
Key features
- LED display with the exact %. No four-dot guessing. You see 63, not "about half".
- Magnetic snap-on, 15W wireless. Locks onto the ring on the back of the phone and charges while you keep using it.
- 22.5W USB-C, in and out. The fast lane when you are low and short on time, and the port that refills the bank.
- USB-A port. A second cable for earbuds, a watch or an older device.
- 20,000mAh. About three full charges of a typical phone, fewer on a large one.
- Four colours. Black, white, purple and green. Same battery, same magnet, same display.
Specifications
The published figures from the manufacturer. Size and weight follow once we have measured our own unit.
| Capacity | 20,000mAh (Li-Polymer) |
|---|---|
| Energy | about 74Wh |
| Wireless output | up to 15W, magnetic |
| USB-C output | up to 22.5W |
| USB-A output | up to 22.5W |
| USB-C input | up to 22.5W |
| Display | LED, exact percentage |
| Colours | black, white, purple, green |
| Warranty | 2 years |
| In the box | power bank and a short USB-C cable (confirmed on first delivery) |
Which phones it fits
The magnet locks onto any phone with a built-in magnetic ring, which means iPhone 12 and every model since. Android phones snap on when they wear a magnetic case. A thick plain case weakens the hold and the wireless charge, so use the cable then. Every phone charges from the USB-C and USB-A ports with its own cable.
Wired or wireless: charging speed
The magnet delivers up to 15W, slow and steady while the phone stays in your hand. The USB-C port delivers up to 22.5W and wastes less energy on the way, so pick the cable when you are low and short on time. The same USB-C port refills the bank at up to 22.5W.
Taking it on a plane
20,000mAh comes to about 74Wh. Spare batteries up to 100Wh, power banks included, travel in hand luggage without airline approval and never in checked bags; Ryanair and KM Malta Airlines both state this. Pack it in your carry-on and check your airline's page before you fly. The full rules are in the guide to power banks on planes.
Delivery, returns and warranty
Free tracked delivery to Ireland and the rest of the EU, with the delivery window on the Delivery page. You have 14 days from delivery to return it for any reason, and a 2-year warranty against faults. Read how returns work, or go back to the ONDO home page for the colour and bundle options.
Reviews
Reviews appear here after the first deliveries. We do not publish placeholder quotes.
Frequently asked questions
Does it work with iPhone and Android?
Yes. Wireless needs a magnetic ring (iPhone 12 and later or a magnetic case). The USB-C port charges any phone.
Is it allowed on planes?
Hand luggage only. About 74 Wh, under the 100 Wh limit most airlines apply. Check your airline.
How long to recharge the bank?
It depends on the charger; the power bank takes up to 22.5 W over USB-C, as the manufacturer states. The recharge time is published after our own test. Charger not included.
What is in the box?
The power bank and a short USB-C cable, as supplied by the manufacturer. Confirmed after our first delivery.
Does it charge through a phone case?
Through a magnetic case, yes. Through a thick plain case the hold weakens and so does the wireless charge, so use the USB-C cable instead.
Can I bring a power bank on a Ryanair or KM Malta Airlines flight?
Yes, in hand luggage. Both airlines accept spare batteries up to 100Wh in the cabin, and the ONDO 20K is about 74Wh. Power banks never go in checked bags, and Ryanair allows at most two per passenger. Check the airline page before you fly.
Is a powerbank the same as a battery pack?
Yes. Power bank, powerbank, portable charger and battery pack all mean the same thing: a battery you carry to charge your phone.
€49.99 · free EU delivery