INIU P63-E1 25,000mAh 100W Power Bank Review

Overview

The INIU P63-E1 is a 25,000mAh power bank built around a simple pitch: give travelers and gear-heavy backpackers a genuine 100W laptop charger without the brick-sized shell most high-capacity banks come in. It’s aimed at people who need to keep a laptop, phone, and a handheld or camera alive over multi-day trips, car camping, or long-haul flights — less so at gram-counting thru-hikers, since 397g is a real tax on a base weight.

Key Specs

Spec	Detail
Capacity	25,000mAh
Max total output	100W
USB-C Port 1	100W max (5V⎓3A, 9V⎓3A, 12V⎓3A, 15V⎓3A, 20V⎓5A)
USB-C Port 2	45W max (5V⎓3A, 9V⎓3A, 12V⎓3A, 15V⎓3A)
USB-A Port	18W max (5V⎓3A, 9V⎓2A, 12V⎓1.5A)
Recharge time	1.4 hours (via 100W input)
Dimensions	110.2 x 70.6 x 35.7 mm
Weight	397g
Airline approved	Yes
Warranty	3 years

Performance

The headline feature is the size-to-capacity ratio. INIU uses what it calls TinyCell high-density battery cells paired with a “HyperStack” internal layout, and the company says it has shrunk a 25,000mAh power bank by 30% compared to typical designs in that capacity class. That’s not just marketing fluff — multiple independent reviewers picked up on the same thing. One reviewer who spent a month with the unit noted the P63 packs a massive 25,000mAh battery, roughly 2.5 times the capacity of the smaller P50, yet weighs less than 1 lb and is manageable to carry in a backpack or pocket. A separate reviewer measured it at around 392g and 11 × 7 × 3.6 cm, noticeably smaller and lighter than most power banks in its class.

On the charging side, the 100W USB-C port is the real differentiator over cheaper 25,000mAh banks that cap out at 18-20W. According to INIU, the P63 can fast charge a MacBook Pro 14” M3 to 72% in 30 minutes from a 20% battery, and add over 17 hours of wireless web browsing to a MacBook Pro 13”. It’s worth flagging, as one reviewer pointed out, that manufacturer numbers don’t mean a lot without real-world context — I’d treat those figures as best-case rather than gospel. Phone charging speeds held up in third-party testing too: the power bank supports Samsung Super Fast Charging 2.0, charging a Samsung S24 Ultra to 75% in 30 minutes. Handheld gaming is also covered — the P63 offers full-speed charging for the Steam Deck, allowing uninterrupted gaming sessions, and one field reviewer confirmed it handled laptop charging, phone charging, and smaller electronics without issue during testing.

Recharge speed is genuinely useful for trip logistics. The 1.4-hour recharge time and the inclusion of a detachable 100W cable both add meaningful practical value — topping off the bank during a lunch stop or a short layover is realistic rather than aspirational.

For travelers, the 25,000mAh figure isn’t arbitrary. The capacity hits a sweet spot because most airlines allow power banks under 100Wh in carry-on luggage without special approval, and the P63 stays within that limit. One outlet went as far as calling it an “airline‑approved mobile studio,” noting the 25,000mAh capacity sits comfortably within carry‑on limits for most airlines.

Build quality gets consistent praise. A longer-term reviewer who used it through hikes, gym sessions, and work travel called out balanced weight distribution and a compact shape that nestles next to mechanical keyboards or controllers in a tech bag without shifting during movement, and pointed to the combination of massive reserves, blistering speeds, thoughtful accessories like the lanyard cable, and rugged build quality as standout traits. That said, the same reviewer’s summary flagged “minor display quirks” as the one wrinkle in an otherwise strong showing — worth keeping expectations in check on the LCD readout’s precision.

At least one real owner posting outside of a sponsored review context backed up the “smallest in class” claim, saying they own it and it’s very good — best bang for the dollar when it comes to size and power output, with 100W input and output, and it’s definitely the smallest 25k mAh power bank they’d found.

Pros & Cons

Pros

• True 100W USB-C output — actually useful for charging modern USB-C laptops, not just a marketing number
• Genuinely compact for a 25,000mAh cell; noticeably smaller than most competitors in this capacity class
• Fast 1.4-hour recharge time via the 100W input port
• Three simultaneous ports (100W USB-C, 45W USB-C, 18W USB-A) cover phone + laptop + accessory charging at once
• Sits just under the 100Wh airline threshold, so no TSA hassle
• Detachable 100W cable instead of a fixed cable that can fray or fail
• 3-year warranty, longer than many budget competitors

Cons

• At 397g, it’s a noticeable addition to a lightweight pack — this is a travel/basecamp tool, not an ultralight thru-hiking accessory
• LCD display has been flagged as slightly imprecise by at least one long-term reviewer
• Manufacturer charging-speed claims (MacBook to 72% in 30 min, etc.) are best treated as ceiling numbers rather than guaranteed results
• Second USB-C port caps at 45W, so charging two power-hungry devices simultaneously means neither gets full speed

Who Should Buy This

This is a good fit for travelers, digital nomads, photographers, and van/car campers who need to keep a laptop and a phone (or a camera, drone, or handheld console) charged for days without reliable wall access, and who care about carry-on weight and airline compliance more than pack weight. It’s less suited to weekend backpackers or thru-hikers optimizing grams, where a smaller 10,000mAh bank or a solar setup makes more sense.

Verdict

The INIU P63-E1 backs up its “smallest 100W, 25,000mAh” pitch with real-world results — fast laptop and phone charging, a quick recharge cycle, and a shell that’s genuinely easier to live with than most bricks in this capacity class. It’s not a pack for ultralight hikers, but for travelers and content creators who need serious charging capacity in carry-on-friendly form, it’s an easy recommendation. I’d put it at a 7.5/10 — docked slightly for weight relative to true ultralight needs and the minor display quibbles noted by long-term users.