INIU Mini 10000mAh Power Bank Review: A Pocket-Size 45W Charger

The INIU Mini 10000mAh power bank is genuinely the size of an AirPods Pro case, and that single design choice colours everything about it. INIU squeezed a 10000mAh portable charger and a 45W USB-C output into a pocket footprint that disappears into a jacket. The result is a slim battery pack that doubles as both a phone battery rescue and, on a good day, a partial laptop top-up.

I ran the INIU Mini through real charge cycles on an iPhone 17, a Samsung phone, and a MacBook Air. Across multiple days of mixed use, it consistently delivered roughly two full charges per phone battery before needing its own recharge. At the listed price of about $22.48 on Amazon, it sits well under the $30 mark that buyers usually expect for a fast charging battery pack in this capacity.

This INIU Mini 10000mAh power bank review breaks down where the 45W fast charging shines, where the design slips, and how it stacks up to obvious rivals like the Anker Nano in the same 10k class.

What I Liked

Genuinely Pocket-Sized

INIU markets the Mini as one of the slimmest 10000mAh power banks on the planet, and in person it lives up to the claim. The pack measures roughly the dimensions of an AirPods Pro case and weighs about 160 grams, so it slides into a jacket pocket or a slim crossbody bag without bulging. For an everyday-carry portable charger, that footprint matters more than another 1000mAh would.

Fast Charging Where It Counts

INIU rates the Mini at a true 45W output over USB-C, with PD and QC fast charging protocols. In practical testing, an iPhone climbed from 20 to 80 percent in 35 to 40 minutes, and a MacBook Air gained 42 percent in 25 minutes. INIU’s own figures claim a Samsung Galaxy S26 Ultra goes from 20 to 92 percent in 30 minutes, and an iPhone 17 Pro Max hits 75 percent in the same window. The PD power delivery feels closer to a wall charger than to a typical 22.5W power bank in this size class.

The Detachable Lanyard Cable

The lanyard cable is the feature you don’t realise you need until you stop hunting for one. INIU bundles a short, nylon-braided USB-C cable that attaches to the bank as a wrist strap, and it’s fully detachable so a frayed cord doesn’t kill the whole battery bank. The cable doubles as the everyday tether for a phone, an iPad, or even a Steam Deck.

Three-Port Flexibility

The Mini ships with two USB-C ports and one USB-A. Either USB-C port handles input or output, which makes the USB c in&out behaviour useful for travel: charge the bank with one USB-C cable while topping up a phone from the other. The USB-A port is there for older accessories, headphones, or a backup torch. The small LED display and power button on the side give a clean readout of remaining capacity, and the same display shows current charging speed when a device is connected.

What Needs Improvement

45W Peak Doesn’t Last

Independent testing on INIU’s 45W compact charger lineup found that the headline 45W output holds for roughly thirty seconds before tapering toward 15 to 20W as the lithium-ion battery and inductor manage voltage and heat. For a phone battery top-up that window is enough to land the early fast-charge phase, but anyone hoping to sustain 45W into a laptop for half an hour should expect the charger to throttle.

Slow Refill With Low-Watt Bricks

The flip side of the slimmest 10000mAh design is that the bank itself is slow to recharge. With a 20W wall charger INIU quotes about two hours to full, but a 5W brick pushes refill time toward five hours. If you only travel with a low-watt cube, plan for an overnight refill rather than topping the bank between flights.

Shared Output Across Ports

The two USB-C ports and the USB-A share a single 45W power budget. Use all three at once and each device drops well below the headline charging speed. Pass-through charging works, but reported draw can fall as low as roughly 8W in and 4W out simultaneously, which makes overnight charge-and-be-charged setups slower than a dedicated wall charger plus battery life routine.

How It Compares

The closest direct rival is the Anker Nano 10000mAh, a 30W power bank in a similar pocket form factor. In head-to-head testing the Anker Nano took 1 hour 53 minutes to fully recharge an iPhone with 51 percent left in the bank, scoring a slightly better efficiency than INIU’s 45W sibling. The Anker hits a lower wattage ceiling but holds its peak more cleanly, which makes it the smarter pick if you don’t need true PD power.

The Anker MagGo 10000mAh Qi2 trades the Mini’s wired 45W for 15W magnetic wireless charging with MagSafe alignment. It’s the better battery pack for an iPhone user who clips-and-goes, but it lacks the multi-port flexibility and the USB-C cable trick on the INIU.

UGREEN’s Uno 10000mAh has a built-in cable and a USB-A plus USB-C combo, similar in spirit to the INIU portable charger. The Uno tops out near 30W sustained, so it can’t match the early-burst speed on a Samsung Galaxy S24 or iPhone 17. If you’ve been eyeing the INIU Megapower or the older INIU P41L, those siblings add features the Mini drops, such as a built-in flashlight, in exchange for a chunkier shell. Across the best power banks in the 10k class right now, the Mini sits in the “smallest with fast charge” niche rather than the “highest efficiency” niche.

Final Verdict

The INIU Mini 10000mAh power bank earns a solid 4.3 out of 5. It nails a tricky brief: pack 10000mAh and a 45W output into a footprint about the size of an AirPods Pro case, sell it under $30, and back it with a three-year INIU Care replacement guarantee. Across an Amazon rating average of 4.5 over 1,872 reviews, real owners agree the size, the lanyard cable, and the everyday fast charging carry the package.

Knock off a fraction for the 45W peak that tapers fast, the slow recharge on low-watt bricks, and the shared output across the USB-C and USB-A ports. If you want pocketable PD power for a phone, a tablet, and the occasional MacBook Air rescue, the INIU Mini is one of the easiest power bank picks at this price.