Anker SOLIX C300 vs Powkey 99Wh: the better portable power pick

Display

Neither product is a display-first device, but the quality of the status readout still matters when you’re trying to manage battery use. The Anker SOLIX C300 generally wins here because Anker tends to offer a more polished interface, clearer battery/charging information, and better app-based monitoring on its SOLIX range. That makes it easier to see input/output power, remaining capacity, and charging status at a glance. The Powkey is much more basic, with a simpler consumer-grade interface that gets the job done but does not feel as refined. Winner: Anker SOLIX C300.

Performance

This is the biggest difference. The Anker SOLIX C300 has a 288Wh LiFePO4 battery and a 300W AC output with 600W surge, which puts it in a much more capable class for camping, backup power, and running multiple small devices. LiFePO4 chemistry is a major plus because it typically offers better cycle life and thermal stability than cheaper NMC-based packs, so it should hold up better over time. The Powkey is rated at 99Wh / 27,000mAh with a 100W output, which is fine for phones, tablets, routers, cameras, and maybe a small fan or LED lighting, but it is far less useful for anything with a meaningful start-up load. In practical terms, the Anker can power more gear for longer and is less likely to hit output limits immediately. Winner: Anker SOLIX C300.

Build quality and design

Anker is the stronger brand here, and that usually translates into better fit, finish, safety engineering, and long-term reliability. The C300’s 288Wh class and 140W two-way fast charging also suggest a more modern power-management design, which is important if you want a unit you can actually use regularly rather than just keep for emergencies. Powkey’s orange 99Wh unit is compact and straightforward, but it feels like a more budget-oriented product built around portability first and capability second. If you care about confidence, durability, and a more premium ownership experience, Anker takes this category. Winner: Anker SOLIX C300.

Battery life

Battery life is where capacity really tells the story. The Anker’s 288Wh battery gives it nearly three times the stored energy of the Powkey’s 99Wh pack, so it will last much longer for the same devices. For example, it is far better suited to topping up a laptop, running lights through an evening, or keeping a phone/router combination going during a power cut. The Powkey is limited by both its smaller battery and its lower 100W ceiling, so it is more of a personal emergency pack than a true household backup. If runtime matters, the Anker wins decisively. Winner: Anker SOLIX C300.

Price and value for money

The Powkey is far cheaper at £80.99 versus £222.90 for the Anker, so on upfront cost alone it is the obvious winner. If your needs are modest and you only want a compact power source for charging phones, cameras, earbuds, or a small USB fan, the Powkey offers acceptable value. However, value is not just about the sticker price; it’s about what you get per pound. The Anker’s larger battery, higher output, LiFePO4 chemistry, and likely better charging flexibility make it much better value for anyone who will actually use the extra capability. If you only need basic backup, Powkey wins on price; if you need a serious portable power station, Anker wins on value. Winner: tie, depending on use case.

Game library/features

Neither product has a game library, so that category does not apply in the literal sense. If we translate this into features and versatility, the Anker still comes out ahead because its 300W output, 600W surge, and 140W two-way fast charging make it more flexible across more devices. It is the more feature-rich power station for real-world use, especially if you want to recharge it quickly from mains or solar and then power a wider range of equipment. The Powkey does have AC/DC/USB/Type-C outlets, which is useful, but the low 100W output limits what those ports can actually do. Winner: Anker SOLIX C300.

Overall user experience

The Anker SOLIX C300 is the better product for most people because it feels like a proper portable power station rather than a small emergency battery with a plug socket. It gives you more usable energy, better longevity thanks to LiFePO4, and more headroom for everyday devices and occasional higher-draw loads. The Powkey’s main advantage is affordability and portability, especially for light-duty travel where 99Wh is enough and you want something easy to carry. But once you factor in the price gap of £141.91, the Anker justifies itself if you want a dependable long-term buy. Overall summary: the Powkey is the budget pick, but the Anker SOLIX C300 is the clear winner for most buyers because it offers much more battery capacity, stronger output, better charging, and better long-term value.