One of the biggest questions when buying a high-capacity power bank for a Steam Deck is simple: can it actually give the handheld a full charge away from a wall outlet? Many power banks can charge a Steam Deck, but they often do so more slowly than a regular wall charger. The INIU Power Bank P63, however, delivered charging performance that felt surprisingly close to plugging the handheld directly into a wall outlet.
This compact power bank packs a 25,000mAh battery and up to 100W USB-C output, giving it enough power to handle phones, tablets, laptops, gaming handhelds, and other compatible devices. Its combination of capacity and high-power output also makes it a practical backup for flights, hotel stays, conventions, remote work, and long gaming sessions away from an outlet. The Steam Deck was the device we were most interested in testing, but we also tested the P63 with multiple smartphones, an Apple Watch, and several full recharge cycles to see how its capacity and charging performance hold up in real-world use.
Although the INIU Power Bank P63 is not officially available in the Philippines, Filipino buyers can order it from the official INIU online store for $66.99, or approximately PHP 4,118, and have it delivered through an international package-forwarding service. Additional shipping, forwarding, and possible import fees are not included in this estimated price.
Packaging
The INIU Power Bank P63 comes in a simple teal-and-white box that clearly presents the product before you open it. The front displays an image of the power bank and included cable, along with its 25,000mAh capacity, 100W output, and three-year warranty.
The back keeps things minimal, featuring an easy-open tear strip, information for verifying the product’s authenticity, and access to warranty and customer support. INIU also provides its support email, website, and social media channels, making it easy to reach the company if any questions or issues arise.
The INIU Power Bank P63
The INIU Power Bank P63 has a compact rectangular body with rounded corners and a mostly matte-black finish that feels simple and understated. However, the surface easily picks up oily fingerprints and smudges, so it may need occasional wiping to keep it looking clean. It measures around 11 x 7 x 3.6cm and weighs approximately 378.3 grams. Despite its more compact body, it still has the noticeable weight expected from a 25,000mAh power bank, although it remains manageable inside a backpack or sling bag.
According to INIU, its High-Density TinyCell™ and HyperStack™ architecture allows the P63 to be around 30% smaller than comparable 25,000mAh power banks, helping it provide laptop-level charging power without taking up too much room in a travel, gaming, or work bag.
Its front combines a dark matte surface with a glossy upper panel that houses the digital battery display, allowing you to check the remaining percentage at a glance, while the lower portion carries the INIU and Fast Charge branding.
The back is even more minimal, with the model information, charging specifications, safety notices, and certification markings printed directly on the casing.
All three charging ports are positioned at the top for easy access. The first USB-C port supports up to 100W output and also serves as the input for recharging the power bank, while the second USB-C port delivers up to 45W and the USB-A port supports up to 18W. Using both second USB-C port and the USB-A port will give up to 15W, while using both first USB-C and second USB-C port will deliver up to 110W and first USB-C and USB-A port gives 83W. And using all 3 ports will deliver up to 80W. The three-port layout also allows the P63 to charge up to three devices simultaneously, making it useful for users carrying a laptop, smartphone, tablet, gaming handheld, camera, or other accessories while traveling or working away from home.
The percentage display also deserves a mention. Instead of relying on four LED dots, you can immediately see how much charge is left, which became extremely useful during our testing.
One of its cleverest design features is the attached braided lanyard, which also acts as a 100W USB-C charging cable.
This gives you a convenient way to carry the power bank while ensuring that a compatible cable is always attached and ready to use.
Lastly, the box includes the usual documentation, including the user manual, warranty information, and other important product details.
Specifications
The INIU Power Bank P63 is surprisingly compact considering what’s inside. The P63 has:
| Specification | INIU Power Bank P63 |
|---|---|
| Model Number | P63 |
| Battery Cell Capacity | 5000mAh/90Wh/18v * 5 (25000mAh) |
| Rated Capacity | 15500mAh(5v) / 8800mAh(9v) / 6100mAh(12V) / 5300mAh(15V) / 3390mAh(20V) |
| Battery Type | Lithium Battery |
| Rated energy | 92.5Wh |
| Maximum single USB-C output | 100W |
| Ports | 2x USB-C, 1x USB-A |
| Dimensions | 4.3 x 2.7 x 1.4 in / 11 x 7 x 3.6 cm |
| Weight | 378.3g |
| Input | 5V = 3A, 9V=3A, 12V=3A, 15V=3A, 20V=3.25A 65W(MAX) |
| Output | Out 1 (100W): 5V=3A, 9V=3A, 12V=3A, 15V=3A, 20V=5A Out 2 (45W): 5V=3A, 9V=3A, 12V=3A, 15V=3A 45W Out 3 (18W): 5V=3A, 9V=2A, 12V=1.5A Out 1 + Out 2: 65W + 45W = 110W Out 1 + Out 3: 65W + 18W = 83W Out 2 + Out 3: 7.5W + 7.5W = 15W Out 1 + Out 2 + Out 3: 65W + 7.5W + 7.5W = 80W |
| Battery indicator | Percentage display |
| Pass-through charging | Yes |
| Fast Charging Protocol | PD3.0, PD2.0, QC3.0, QC2.0, PPS, AFC, etc… |
| Warranty | 3 years |
Android Charging Test
For Android, we tested the P63 using a completely empty Xiaomi 14 smartphone. The phone reached 51% in only 26 minutes while using just 14% of the power bank, then reached a full charge after 1 hour and 11 minutes, consuming 27% of the P63 overall.
| Xiaomi 14 Battery | Charging Time | INIU Used |
|---|---|---|
| 0% → 51% | 26m | 14% |
| 0% → 100% | 1h 11m | 27% |
In practical terms, a complete Android phone charge used just over one-quarter of the P63’s battery, leaving plenty of capacity for additional devices.
iPhone 16 Pro Max Charging Test
We performed three iPhone 16 Pro Max charging tests under different starting conditions. In the quickest test, the iPhone went from 10% to 80% in 42 minutes, gaining 70% while consuming 23% of the P63. A second iPhone went from 49% to 98% in 1 hour and 21 minutes, while our full-charge test brought a nearly empty iPhone from 5% to 100% in 1 hour and 59 minutes.
| iPhone Battery | Charging Time | INIU Used |
|---|---|---|
| 10% → 80% | 42m | 23% |
| 49% → 98% | 1h 21m | 19% |
| 5% → 100% | 1h 59m | 29% |
The full-charge result is the easiest way to understand the P63’s phone capacity: one nearly empty iPhone used less than one-third of the power bank, giving it enough reserve for multiple smartphone charges.
Steam Deck OLED Charging Test
The Steam Deck OLED was the most demanding and important test. Using its original wall charger, the handheld went from 10% to 100% in 1 hour and 59 minutes. The INIU Power Bank P63 completed the same charge in 2 hours and 12 minutes, making it only 13 minutes slower than the original charger.
| Charger | Steam Deck Battery | Charging Time | INIU Used |
|---|---|---|---|
| Steam Deck original charger | 10% → 100% | 1h 59m | — |
| INIU Power Bank P63 | 10% → 100% | 2h 12m | 95% |
| INIU Power Bank P63 | 0% → 100% | 2h 25m | 100% |
The P63 charged the Steam Deck almost as quickly as a wall charger, but the process consumed 95% of the power bank, leaving only 5% remaining. This makes it roughly one additional major Steam Deck charge away from a wall socket, which remains extremely useful for flights, road trips, power outages, or long gaming sessions away from home.
Other Devices
The P63 also handled smaller devices without consuming much of its capacity.
| Device | Battery Charged | Charging Time | INIU Used |
|---|---|---|---|
| Apple Watch | 0% → 100% | 1h 11m | 4% |
A full Apple Watch charge barely made a dent in the P63, leaving plenty of capacity for larger devices.
How Fast Does the INIU P63 Recharge?
We also tested how quickly the power bank itself could recharge. Across two tests, the P63 went from nearly empty to full in around two hours under our test setup. That’s fast enough that you can drain it during the day, recharge it during dinner or while working, and have it ready again without leaving it plugged in overnight.
| INIU Battery | Full Recharge Time |
|---|---|
| 5% → 100% | 1h 47m |
| 1% → 100% | 2h 5m |
Conclusion
The INIU Power Bank P63 is easy to recommend if you want one power bank capable of handling everyday devices and more demanding hardware. Its phone performance was consistently strong, providing quick and substantial charges while leaving enough capacity for other devices.
The Steam Deck result is what really sets it apart. The P63 fully charged our Steam Deck at a speed that felt close to using its original wall charger, although doing so consumed almost the entire power bank. This makes it less like a bottomless battery and more like a compact portable reserve capable of giving your Steam Deck a complete recharge or providing several substantial smartphone charges.
It is not particularly light, but its size and weight feel reasonable for the amount of power and charging performance it provides. For users carrying a Steam Deck, laptop, smartphone, tablet, or multiple devices while traveling, the INIU Power Bank P63 offers an excellent balance of portability, capacity, and real-world performance.
Where to Buy
The INIU Cougar P63 is available through the official INIU online store, where you can check its latest price, availability, shipping options, and ongoing promotions.