Choose the Power Brick I (10,050mAh, £49.99) for day hikes, single-overnight trips, and anyone prioritising light weight over maximum capacity. Choose the Power Brick II (20,000mAh, £99.99) for multi-day trips, charging several devices at once, or if you want MagSafe-compatible wireless charging. Both share the same IP67 durability, 1,300-lumen SOS light and 3-year warranty  the decision comes down to capacity, ports, and whether wireless charging matters to you. This comparison breaks down every spec and matches each model to real use cases.

Key Takeaways

• Power Brick I and II share the same rugged core  IP67 rating, SOS light, carabiner, 3-year warranty  so the choice is purely about capacity and charging needs, not durability.

• Power Brick II roughly doubles capacity (20,000mAh vs 10,050mAh) and ports (4 simultaneous outputs vs 2) for double the price.

• Only Power Brick II has wireless/MagSafe charging  a deciding factor if your phone setup relies on it.

• Independent testing on the Power Brick I found it delivers roughly 2 full smartphone charges in practice, consistent with its rated capacity once conversion loss is accounted for.

• If you're unsure how much capacity you actually need, work it out with a device-by-device calculation rather than guessing  it removes the guesswork from this whole comparison.

Full Spec Comparison

What's Identical on Both Models

Before the differences, it's worth being clear about what you get either way  both power banks share the same rugged foundation:

How the Power Brick I Performs in Real Testing

Independent testing gives a useful reality check beyond the spec sheet. TechRadar's review of the Power Brick I recorded it fully charging a Google Pixel 7a (4,385mAh battery) from empty in just under two hours via USB-C, using roughly one quarter of the power bank's own charge in the process  consistent with delivering around 2–3 full phone charges per full charge of the unit. The same review noted the IP67 build as genuinely rugged, with solid, flex-free panels, while flagging the single port-access flap as a minor design compromise given the pack has two ports sharing one cover.

[ADD FIRST-HAND EXAMPLE: e.g., RUGD's own internal testing data for Power Brick II charge counts  pull from product testing notes]

Which One Fits Your Trip? A Use-Case Breakdown

Ports and Simultaneous Charging: The Practical Difference

Power Brick I's two ports (one USB-C, one USB-A) mean you can charge two devices at once  fine for a solo hiker running a phone and a headlamp. Power Brick II's four outputs (two USB-C, two USB-A, plus the wireless pad) mean a phone, a tablet, earbuds and a watch can all charge simultaneously  the difference that matters for families, groups, or anyone carrying a heavier device kit.

Wireless Charging: The Feature Power Brick I Doesn't Have

Power Brick II's 15W wireless pad is MagSafe-compatible, meaning a MagSafe-cased iPhone snaps on and charges without a cable  useful at a campsite table or car dashboard where cable management is annoying. This is the single feature that most clearly separates the two models beyond raw capacity. We've covered how this works in more detail in our guide to MagSafe wireless charging on the Power Brick II.

Still Not Sure Which Capacity You Need?

Spec comparisons only get you so far  the right answer depends on your actual device list and trip length. Rather than guessing between 10,050mAh and 20,000mAh, run the numbers: our power bank capacity guide walks through the exact formula (daily device draw × days without charging × buffer) so you can match capacity to your specific trip instead of picking based on price alone.

Taking Either One on a Flight?

Both models fall safely within the standard 100Wh carry-on limit most airlines apply to lithium batteries, but they must travel in hand luggage, never checked bags. Full rules and airline-specific guidance are covered in our guide to power banks and airline hand luggage rules.

Frequently Asked Questions

What's the main difference between Power Brick I and Power Brick II?

Capacity and charging options. Power Brick I holds 10,050mAh with two ports; Power Brick II holds 20,000mAh with four output options including 15W MagSafe-compatible wireless charging. Durability, the SOS light and the warranty are identical on both.

Is Power Brick II worth double the price of Power Brick I?

If you need to charge multiple devices simultaneously, want wireless charging, or take trips longer than a single overnight, yes  the extra capacity and ports directly solve those problems. For solo day hikes or single-overnight trips where light weight matters most, Power Brick I covers the need at half the cost.

Does Power Brick I support wireless charging?

No. Wireless and MagSafe-compatible charging is exclusive to Power Brick II. Power Brick I charges via USB-C PD and USB-A ports only.

How many phone charges does the Power Brick I actually deliver?

Independent testing found it fully charged a 4,385mAh phone battery using roughly a quarter of its own charge, consistent with delivering approximately 2–3 full smartphone charges per full charge of the unit  in line with its 10,050mAh rating once normal conversion loss is factored in.

Can I use both power banks on a flight?

Yes  both fall within the standard 100Wh airline limit for carry-on lithium batteries. They must be packed in hand luggage rather than checked bags, per standard airline and TSA guidance.

The Short Answer

Day hikes and weight-conscious packing: Power Brick I. Multi-day trips, multiple devices, or wireless charging: Power Brick II. If you're still torn, the capacity guide linked above will settle it with actual numbers rather than a guess.