Portable power banks have become essential accessories for gamers, content creators, and professionals alike. Whether it's extending a Steam Deck session on a long journey, keeping a laptop alive through a day of remote work, or charging multiple devices while travelling, capacity and charging speed matter just as much as portability.
The INIU Cougar P63 aims to solve a common problem with high-capacity power banks: size. Packing a sizeable 25,000mAh battery and up to 100W USB-C Power Delivery into a chassis that INIU claims is around 30% smaller than comparable models, it promises desktop-class charging without becoming another heavy brick in a backpack.
After examining its features, specifications, and real-world use cases, the Cougar P63 proves to be one of the more thoughtfully designed premium power banks currently available.
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Design and Build Quality
The first thing that stands out is just how compact the Cougar P63 is for its battery capacity.
At just 11 x 7 x 3.6cm and weighing 392g, it feels significantly more portable than many competing 25,000mAh power banks. While it certainly isn't pocket-sized in the traditional sense, it comfortably fits into backpacks, laptop sleeves and travel organisers without taking up excessive space.
INIU achieves this through its TinyCell battery technology and HyperStack internal architecture, allowing the company to reduce the overall footprint while maintaining full battery capacity.
The build quality also feels reassuringly premium. The rounded edges make it comfortable to hold, while the digital battery display offers a much more accurate indication of remaining power than the traditional four LED lights found on many competitors.
One particularly clever inclusion is the detachable braided USB-C cable that doubles as a carrying lanyard. It's a small design decision, but one that solves the surprisingly common problem of forgetting to pack a charging cable.
Performance That Easily Handles Modern Gaming Devices
For gaming handhelds, charging speed has become increasingly important.
Devices like the Steam Deck, ASUS ROG Ally and modern gaming laptops often require significantly more power than traditional portable chargers can deliver.
The Cougar P63's 100W USB-C output changes that.
Rather than simply maintaining battery levels during gameplay, it provides enough power to actively charge demanding devices while they're in use.
For handheld PC gamers, this is a major advantage.
INIU estimates approximately:
- Around 4 additional hours of Steam Deck AAA gaming
- Approximately 3.5 extra hours on an ASUS ROG Ally running Turbo Mode
- Up to 10 extra hours on a Nintendo Switch OLED
While real-world battery life naturally depends on game settings, brightness and power profiles, these figures illustrate that the P63 is capable of meaningfully extending gaming sessions instead of merely slowing battery drain.
The ability to charge while playing makes it particularly useful during flights, long train journeys or gaming events where power outlets aren't always available.
100W Laptop Charging Feels Like Carrying a Wall Charger
Many power banks advertise laptop compatibility but deliver charging speeds that barely keep pace with power consumption.
That isn't the case here.
With 100W USB-C Power Delivery, the Cougar P63 delivers charging speeds that rival many original laptop chargers.
For creators, developers and professionals working remotely, this means a dead MacBook or Windows ultrabook doesn't necessarily signal the end of the workday.
INIU claims the charger can take a MacBook Pro 14-inch to roughly 72% in just 30 minutes, while providing approximately 17 additional hours of wireless web browsing from a full battery.
Although actual performance varies depending on workload and device configuration, the specifications align well with what users should expect from a genuine high-wattage USB PD power bank.
Fast Charging Across Multiple Devices
The Cougar P63 includes:
- 2 USB-C ports
- 1 USB-A port
This allows simultaneous charging of three devices while intelligently distributing available power.
Its maximum outputs include:
- USB-C 1: 100W
- USB-C 2: 45W
- USB-A: 18W
That makes it easy to charge combinations such as:
- Laptop + smartphone
- Steam Deck + wireless earbuds
- Tablet + Nintendo Switch + phone
The total output remains impressive, ensuring users don't need to constantly unplug devices to prioritise charging.
Pass-through charging is another welcome addition, allowing the power bank itself to recharge while simultaneously powering connected devices.
Battery Capacity That Supports Extended Travel
The 25,000mAh capacity sits just below many airline carry-on battery limits, making it an excellent option for international travel.
For most users, it represents multiple days of charging without needing access to wall power.
INIU positions the P63 for week-long trips, and while actual endurance depends entirely on the devices being charged, there's certainly enough capacity to comfortably support several days of mixed smartphone, tablet and handheld gaming use.
Photographers and drone pilots also benefit from the high output, with compatibility extending to DJI drones and numerous mirrorless camera charging systems.
Smart Features That Improve Everyday Use
Beyond the headline specifications, several smaller quality-of-life improvements help distinguish the P63.
The integrated digital display provides precise battery percentages rather than vague indicator lights.
The included braided USB-C cable eliminates the need to carry a separate cable for most USB-C devices.
Fast 65W input allows the power bank itself to recharge from empty in approximately 1.4 hours when paired with an appropriate charger.
These aren't headline-grabbing features individually, but together they create a noticeably smoother user experience.
Safety and Reliability
High-output power banks naturally generate heat under heavy loads, making safety systems increasingly important.
INIU incorporates an 18-layer SmartProtect system designed to monitor charging, temperature and electrical stability.
The company also highlights extensive laboratory durability testing, including impact and low-temperature stress testing.
While these demonstrations are primarily marketing showcases, the inclusion of multiple safety protections and a three-year warranty provides additional confidence for long-term use.
Where the Cougar P63 Falls Slightly Short
The Cougar P63 is difficult to criticise, but it isn't perfect.
At nearly 400g, it's impressively compact for its capacity, though it still carries noticeable weight compared to smaller everyday power banks. Users who only need occasional smartphone top-ups may find a 10,000mAh or 20,000mAh model more practical.
Likewise, while the 100W output is excellent for most laptops and gaming handhelds, power users with dual-laptop workflows or particularly demanding workstations may prefer stepping up to the higher-end Cougar P64 with its 140W output.
Neither issue feels like a major drawback, but they are worth considering depending on individual needs.
Final Verdict
The INIU Cougar P63 strikes an impressive balance between power, portability and versatility.
Its combination of a genuine 100W USB-C Power Delivery, generous 25,000mAh capacity, thoughtful design and surprisingly compact dimensions makes it one of the strongest all-round portable chargers in its category.
For gamers, it comfortably supports handheld PCs like the Steam Deck and ROG Ally. For professionals, it provides enough power to keep modern laptops productive throughout the day. For travellers, its airline-friendly capacity and multi-device charging capabilities make it an excellent companion.
While those with lighter charging needs may not require this much capacity, anyone regularly carrying multiple USB-C devices will appreciate the flexibility the Cougar P63 offers.
Rating: 9/10
Pros
- Excellent 100W USB-C charging performance
- Compact design for a 25,000mAh battery
- Charges laptops, gaming handhelds and phones with ease
- Useful detachable braided USB-C cable
- Accurate digital battery display
- Fast 65W self-recharging
- Three-device simultaneous charging
- Three-year warranty
Cons
- Heavier than smaller-capacity power banks
- Most casual users won't fully utilise its high power output
For users seeking a premium portable charger capable of powering everything from smartphones to gaming laptops, the INIU Cougar P63 delivers an excellent balance of performance, portability and convenience. It is a well-rounded power bank that lives up to its flagship positioning without overpromising on what it can realistically achieve.
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