A 20,000mAh power bank will keep your smartphone fully charged and ready to go for days without needing an outlet — for your phone or your power bank. Here are our recommendations for some of the best portable chargers with a capacity of 20,000mAh!

Note: With regards to the power banks that feature USB-C ports, do make sure that your device is compatible with that 20,000mAh power bank before you buy it. 

See also: 

POWERADD Pilot X7 20,000mAh portable charger

This portable charger from POWERADD is a lithium polymer battery, which should make it safe to use than the standard lithium-ion battery. The charger also automatically detects what kind of battery your smartphone has and charges it as fast as possible, up to a 3.4A output. Also, if you charge the 20,000 battery itself, it should take about 10 hours if you have a 2A output charger. The charger has two USB ports that should charge up to devices at once, and also has a number of safeguards against issues like excessive current, overheating, overcharging and more. You can get this PowerADD portable charger from Amazon in three colors (blue, black or black with red accents) for $26.99.

Hokonui 20,000mAh portable charger

The Hokonui 20,000mAh portable charger is pretty thin at just 14mm, and it has an anti-slip texture on top to keep it from sliding off your tablet. It also has a big LED display to show you things like how much charge is life in the battery, along with how much power is going in and out of the charger, and if the devices connecting to it use the Qualcomm Quick Charge 3.0 support. In addition to the QC 3.0 port, it has two USB-A output ports, a USB-C input port, a microUSB input port, and even a Lightning input port. You can get this 20,000mAh portable charger from Amazon for $39.99.

iMuto X5-TC 16,750mAh portable charger

20000mAh power bank

The iMuto X5-TC is a portable power bank with a capacity of 16,750mAh. The device comes with two regular USB ports and a USB Type-C port, and you can charge your smartphones or tablets multiple times, and even fully charge the new Macbook once. A digital display shows you exactly how much charge is left on the power bank. Like every charger on this list, there are also multiple protections to avoid over-charging, over-voltage, over-current, and short circuit.

Key details:

  • Capacity: 16,750mAh
  • Output: 2 x 5V/2.4A max, 1 x USB-C port 5V/3A
  • Dimensions: 129.5 x 79 x 20 mm, 295 grams
  • Current price: $29.74

AUKEY 20,000mAh portable charger

Portable battery charger - Aukey

AUKEY is a pretty well-known name in the phone accessories industry, and that goes for its portable battery chargers too. Its product lineup includes this 20,000mAh external battery, which has a pretty thin and slim design compared to the more bulky devices on this list. Even with its thin casing, it has four power output ports for charging up to four devices at once.

The four ports include three standard USB ports plus one USB Type-C port for charging the newest smartphones and tablets. That port can also charge the battery itself. It also has a Micro-USB port and a Lightning port for inputs. The battery itself takes about 10 hours to fully charge up. Finally, this battery has an LED indicator to show how much charge is left over. You can get this AUKEY battery charger now on Amazon for $39.99.

Key details:

  • Capacity: 20,000mAh
  • Output: 1 x USB-C port 5V/3A max, 3 x USB ports  5V/2A
  • Dimensions: 200 x 96 x 14mm, 435 grams
  • Current price: $39.99

RAVPower 20,100mAh portable charger

RAVPower is a trusted name in portable battery chargers, and this particular option features a large 20,100mAh capacity. This power bank comes with three USB ports, including a USB Type-C port with 30W output to let you charge a MacBook and charge the Nintendo Switch while using it, as well as a regular USB port with support for Qualcomm Quick Charge 3.0.

Key details:

  • Capacity: 20,100mAh
  • Output: 1 x USB port 5V/2.4A, 1 x USB-C port 5V/3A, 1 x QC 3.0 port 5V/2.4A , 6.5V~9V/1.5A, 9V~12V/1.2A
  • Dimensions: 173 x 81 x 22.1 mm, 381 grams
  • Current price: $49.99

Anker PowerCore II 20,100mAh portable charger

Best portable chargers - AnkerAnker is one of the most popular makers of the best portable phone chargers, with a variety of options available, ranging from slim, ultra-portable ones, to those like the PowerCore II. This battery pack comes with an impressive capacity of 20,100mAh, which should be enough to fully charge your smartphone or tablet multiple times. You get two USB ports with PowerIQ 2.0 technology, which should charge up your phone in as little as an hour and a half, compared to the two hours it took the company’s chargers  with the older PowerIQ1.0 tech.

In addition, the portable battery pack itself can be charged in as little as five hours if it uses a Quick Charge compatible cable. All in all, this is an excellent all-around portable charger, with lots of capacity, and the ability to quickly charge up to two devices at once. You can snap it up on Amazon for $59.99.

Key details:

  • Capacity: 20,100mAh
  • Output: 2 x PowerIQ 2.0 ports (18W Port: 5-9V=2A, 9-12V=1.5A; 12W Port: 5V=2.4A)
  • Dimensions: 6.7 x 2.4 x 0.9 inch, 369 grams
  • Current price: $59.99

AideaZ 20,000mAh portable battery charger

Portable battery charger - AideaZ

The Aidez portable charger not only has a battery with a big 20,000mAh capacity, it also offers wireless charging. Owners can place compatible phones on top of the battery and charge them up with cable free. It also has two USB Type-C ports with Quick Charge support for a more conventional, and faster, phone charging experience. That means this portable battery can charge two wired phones and one wireless phone at the same time. The battery also has an LED indicator to let you know the exact charge percentage left in the battery. It’s available now on Amazon for $37.99.

Key details:

  • Capacity: 20,000mAh
  • Output: 2 x USB-C output ports (5-6V⎓3A, 6-9V⎓2A, 9-12V⎓1.5A), wireless charging
  • Dimensions: 6.7 x 2.4 x 0.9 inches, 13.3 ounces
  • Current price: $37.99

Those are some of the best portable chargers and power banks with capacities around 20,000mAh currently available. Which one is your favorite?