Best Small Power Banks of 2026

Forty-five watts is the headline, and it is the highest output in this roundup. That is more than any phone will draw, which is the point: this is the bank here with real headroom for a tablet or another USB-C device that can take the power. Anker fits it into a body measuring 3.21 by 1.42 by 1.99 inches, with a retractable USB-C cable built in.

We think that headroom is what you're paying for, and it earns its place in a household with an iPad in the bag as well as a phone. The retractable cable is the second good idea: pull it out, charge, let it wind back, and there is no loose cord to lose in a rucksack. Day to day it is the tidiest bank here.

Two things to weigh. At 231 grams it is the heaviest pick in the roundup, and you feel it in a light jacket. Battery longevity is the softer spot — some units stop holding a charge earlier than they should, so buy from somewhere with a straightforward return policy.

A third of an inch thick with magnets in the back: this is the only wireless bank we kept in the roundup. It snaps onto a MagSafe iPhone, charges at up to 15W over Qi2, and there is no cable to plug in — stick it on and keep using the phone.

The catch is capacity. 5,000mAh is one decent top-up rather than a weekend's worth, and wireless charging loses some of it to heat on the way to the phone. The upside is weight: 4.32 ounces on the spec sheet, light enough to leave stuck to a phone in a pocket and genuinely forget about.

We like it for the day when you're carrying nothing else — no bag, no cable, no charger. It is the bank here that solves a problem the others don't, which is absent-mindedness: keep it topped up and it is always the right shape to help.

It does run warm, and so does the phone behind it. That is the physics of wireless charging rather than a fault, but it is noticeable on a summer walk, and a thick case makes it worse. Take the case off if you can.

Aluminum, machined rather than molded, and it is the first thing anyone notices about this bank. It measures 0.6 inches thick and 6.8 ounces, with a built-in USB-C cable, a 10,000mAh cell and 22.5W output. It looks and feels like a more expensive piece of kit than it is.

Our take: this is the pick when you want 10,000mAh and don't want to think hard about it. The built-in cable is a real convenience, the metal shell shrugs off bag life, and 22.5W is enough for a phone. The metal is what you pay for in the pocket — at 6.8 ounces it drags on a light jacket in a way the plastic banks here don't.

Lipstick-sized is the right description: 3.06 by 1.09 by 1.07 inches and 3.37 ounces, which disappears into a jeans pocket beside a phone. It holds 6,000mAh, pushes 20W over USB-C PD, and the little LCD shows the exact percentage rather than four vague dots. For a commute-sized top-up, we think that combination is hard to beat.

What it isn't is a weekend bank: a two-day trip means charging both it and your phone overnight. It is also plain — a purple plastic stick with a small screen — and the one-year warranty is the shortest in this roundup, which is worth knowing if you're hard on your gear.

Same 45 watts as our Anker pick, same 10,000mAh, and a 0.5-inch body by the listed dimensions. The built-in USB-C cable runs both ways — it charges your phone and refills the bank — and an LED readout shows the exact percentage instead of a row of lights.

Two USB-C ports at 45W and a USB-A at 22.5W mean three devices can share it, which is more than a phone needs but useful on a trip. The display is the part we appreciate most: no guessing whether it is at 30 or 60 percent before you leave the house.

Forty-five watts in a body this slim means heat, and the bank warms up under a sustained fast charge. That is normal for the output rather than a fault, but it is a reason to keep it out of a hot car and off a duvet. If you like a gadget to feel finished, this is the one here that does: readout, two-way cable, slim shell, nothing missing.

Three ports on a bank this cheap is the reason to look: two USB-C with 20W PD and one USB-A, plus a 10,000mAh cell inside a body measuring 4.57 by 2.83 by 0.66 inches.

In the hand it is the plainest bank here — a striped plastic shell and four indicator lights rather than a percentage readout. None of that matters much in a bag, which is where this one belongs.

Speed is the usual 20W story: quick enough to be useful on a phone, no fireworks, and it will run a second device off the USB-A port without complaint.

Our verdict on this one is simple. It is the bank to buy as a spare, or as the one that lives in a work bag and gets forgotten until it is needed, and it does that job without fuss. Just don't expect it to feel like the Anker when you pick it up.

A 2.75-inch square, 0.9 inches thick, 5.8 ounces, with a small digital readout on the face and a 10,000mAh cell inside. It is the odd shape of the roundup — most of these are slabs — and it sits in a bag pocket rather than clipped against a phone.

The readout turned out to be the feature we used most. Knowing it is at 43 percent rather than somewhere between two and three lights changes when you plug it in, and it is the thing you miss when you go back to a light-only bank.

Output is rated at 3A across USB-C and USB-A, which is plenty for a phone and not much beyond it. Two devices at once is the realistic limit, and a tablet will take its time.

Where it lands for us is as a second bank: the one in the glovebox or the rucksack that gets checked once a month, because the display makes checking easy. It won't win a speed contest, and it doesn't need to.