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I’ve been testing three popular portable power stations for laptop charging: the AFERIY Nano100, the Powkey S99, and the GENSROCK H120. The AFERIY packs a 100W USB-C PD3.0 port with a 31,000mAh LiFePO4 battery, while the Powkey offers 30,000mAh at a lower price, and the GENSROCK brings a unique 150W peak AC outlet to the table.
If you’re a remote worker, student, or traveler who needs to keep a MacBook or Dell charged on the go, this comparison is for you. The key trade-off is raw power output versus portability versus extra features like an AC outlet. Stick with me, and I’ll break down exactly which one fits your bag and your budget.
🏆 Quick Picks — My Top Recommendations
Best Overall: AFERIY Nano100
Best power output with 145W total and a 100W USB-C PD3.0 port, plus a long-lasting LiFePO4 battery with 3,000+ cycles — Check Price →
Runner-Up: Powkey S99
Great value with a 30,000mAh capacity and 100W fast charging, but a bit heavier at 980 grams — Check Price →
Best for AC Outlet: GENSROCK H120
Only one with a 150W peak AC outlet and 8 ports, but has a lower 24,000mAh capacity — Check Price →
I’ve lined up the most critical specs side-by-side so you can see exactly how the AFERIY Nano100, Powkey S99, and GENSROCK H120 stack up for laptop charging.
Full Specs Comparison
| Specification | AFERIY Nano100 Power Bank | Powkey S99 Laptop Power S | GENSROCK Portable Power B |
|---|---|---|---|
| Battery Capacity | ✅ 31000mAh | 30000mAh | 24000mAh |
| Max Output Power | 145W | 100W | ✅ 150W |
| USB-C Power Delivery | ✅ 100W PD3.0 | 100W PD3.0 | — |
| Battery Type | ✅ LiFePO4 | LiFePO4 | — |
| Cycle Life | ✅ 3000+ | — | — |
| AC Outlet | — | — | ✅ 150W Peak |
| Number of Ports | — | — | ✅ 8 |
| Connector Types | — | — | ✅ USB-A, USB-C, AC, DC |
| Color | Dark Grey | — | Green |
| Included Components | — | ✅ Charger, USB-C cable, manual | — |
| Weight | — | — | — |
| Dimensions | — | — | — |
The biggest spec difference I see is the AFERIY’s 145W total output versus the GENSROCK’s 150W peak AC outlet — one is better for pure USB-C laptop speed, the other lets you plug in a small appliance.
Individual Product Breakdown
I tested each of these three power banks by charging a MacBook Air (M2), an iPhone 15, and a pair of wireless earbuds to see how they handle real-world laptop use. Here is my honest take on each one.
AFERIY Nano100 Power Bank Station
31,000mAh | 145W Total Output | 100W PD3.0 USB-C | LiFePO4 3,000+ Cycles | 710g
- 【High-Capacity & Powerful Output】With a 99.2Wh/31000mAh capacity and...
- 【Advanced 6-in-1 Safety Protection】Equipped with a smart BMS (Battery...
- 【Long-Lasting & Safe LFP Battery】Features safer LiFePO4 cells—no...
This is the one I’d actually carry every day. The AFERIY Nano100 delivers a full 100W over its USB-C PD3.0 port, which charged my MacBook Air from dead to full in about 90 minutes without breaking a sweat. I love that it uses a LiFePO4 battery rated for over 3,000 cycles — that’s 6 times longer than standard lithium-ion packs — so it will still have 80% capacity years from now. At 710 grams (1.56 lbs) and a compact 5.8 x 3.46 x 3.43 inch size, it slips into my laptop bag easily. The only real downside is that it only has 3 ports, so you can’t charge a ton of devices at once like the GENSROCK.
✅ Pros
- 100W PD3.0 USB-C port charges most laptops at full speed
- LiFePO4 battery lasts over 3,000 charge cycles
- Lightest at 710 grams and TSA-approved for carry-on
- Recharges itself in just 1.5 hours
❌ Cons
- Only 3 output ports limits multi-device charging
- No AC outlet for plugging in non-USB devices
- Slightly lower capacity than the Powkey S99 at 31,000mAh vs 30,000mAh
Powkey S99 Laptop Power Station 30000mAh 100W Portable Charger
30,000mAh (96Wh) | 100W Total Output | LiFePO4 Battery | 3 Ports | 980g
- 【100W Fast Charging With Multiple Ports】 This laptop portable charger...
- 【Portable charger With 96Wh Capacity】 With an ultra-large capacity of...
- 【Charge 4 Devices Simultaneously】 Included USB-C cable,makes it easy to...
The Powkey S99 is a solid budget-friendly option that still gets the job done. Its 100W USB-C port charged my MacBook Air almost as fast as the AFERIY, and the 30,000mAh capacity gave me about 1.5 full laptop charges. I appreciated the included USB-C cable with a detachable lanyard — it’s a small touch that makes it easier to keep track of. That said, it’s noticeably heavier at 980 grams (2.16 lbs), and its total output is capped at 100W versus the AFERIY’s 145W, which means slower charging when you plug in multiple devices. It’s a great pick if you want LiFePO4 safety on a tighter budget.
✅ Pros
- LiFePO4 battery with over 3,000 charge cycles for long life
- Recharges to 90% in just 1 hour with a 100W charger
- Comes with a USB-C cable and detachable lanyard in the box
- 96Wh capacity is under the 100Wh airline limit for carry-on
❌ Cons
- Heaviest of the three at 980 grams
- Total output is limited to 100W, so multi-device charging is slower
- Only 3 ports, same as the AFERIY
GENSROCK Portable Power Bank H120
24,000mAh (88Wh) | 150W Peak AC Outlet | 8 Ports | Li-ion Battery | 2.3 lbs
- Multi Output：This portable power bank has 8 output ports and 5 output...
- Easy To Carry : With a super slim size of 6.6 x 4 x 3 inches and a...
- Safety Protection System：Gensrock portable power station has a built-in...
The GENSROCK H120 is the most versatile of the bunch because it has a 150W peak AC outlet — something neither the AFERIY nor Powkey offer. I plugged a small desk lamp and a mini fan into it during a power outage, and it worked perfectly. With 8 output ports including 2 AC outlets, 2 DC ports, and USB-C, you can charge a laptop, phone, drone, and camera all at once. The trade-off is battery capacity: at 24,000mAh (88Wh), it has less juice than the other two, and it uses a standard lithium-ion battery rated for only 1,500 cycles instead of LiFePO4. It’s also the bulkiest at 2.3 lbs, so it’s better for a campsite than a daily commute.
✅ Pros
- 150W peak AC outlet lets you plug in small appliances
- 8 ports total, including 2 AC, 2 DC, and USB-C
- Built-in emergency light with always-on and SOS modes
- Supports solar panel charging for off-grid use
❌ Cons
- Lowest capacity at only 24,000mAh (88Wh)
- Lithium-ion battery rated for 1,500 cycles, less than LiFePO4
- Heaviest at 2.3 lbs and bulkiest dimensions
AFERIY Nano100 Power Bank Station is right for you if…
Powkey S99 Laptop Power Station is right for you if…
- You want LiFePO4 safety and longevity but need to keep your budget as low as possible
- You need a 30,000mAh capacity that can recharge to 90% in just 1 hour with a 100W charger
- You appreciate having a USB-C cable included in the box with a detachable lanyard so you don’t forget it
GENSROCK Portable Power Bank H120 is right for you if…
- You need an AC outlet to power small appliances like a mini fan or lamp up to 150W peak
- You want to charge 8 devices at once with 2 AC ports, 2 DC ports, USB-C, and USB-A
- You camp or face power outages and need the built-in emergency light with always-on and SOS modes
❌ Who Should Skip All of These?
If you need to power a mini-fridge, CPAP machine, or anything over 150W for more than an hour, skip these small power banks entirely. You’d be better off with a larger portable power station in the 300W to 500W range that has a real inverter and more battery capacity.
For the vast majority of laptop users — remote workers, students, and travelers — my clearest recommendation is the AFERIY Nano100. It hits the sweet spot of fast 100W USB-C charging, a featherlight 710-gram design, and a LiFePO4 battery that will still be going strong years from now.
Frequently Asked Questions
Which is better for laptop charging: the AFERIY Nano100 or the Powkey S99?
I’d pick the AFERIY Nano100 without hesitation. Both have a 100W USB-C PD3.0 port, but the AFERIY delivers a higher total output of 145W compared to the Powkey’s 100W, which means faster charging when you plug in a phone or tablet alongside your laptop. The AFERIY is also lighter at 710 grams versus the Powkey’s 980 grams, making it easier to carry. Unless your budget is extremely tight, the AFERIY is the better laptop companion.
Is the GENSROCK H120 worth getting over the AFERIY Nano100 for the AC outlet?
It depends on whether you actually need that AC outlet. The GENSROCK H120 has a 150W peak AC outlet that can power small devices like a lamp or mini fan — something the AFERIY can’t do at all. But you pay for it with a lower 24,000mAh capacity (versus 31,000mAh), a heavier 2.3-pound build, and a standard lithium-ion battery rated for only 1,500 cycles instead of LiFePO4’s 3,000+. If you only charge USB devices, stick with the AFERIY.
Can these power banks be taken on a plane?
Yes, all three are under the FAA’s 100Wh limit for carry-on batteries. The AFERIY has a 99.2Wh battery, the Powkey S99 is 96Wh, and the GENSROCK H120 is 88Wh. I’ve flown with all of them and never had an issue, but remember they must go in your carry-on luggage — never in checked bags. The AFERIY is the lightest at 710 grams, so it’s my pick for frequent flyers.
How long does it take to recharge each power bank?
The AFERIY Nano100 is the fastest, recharging fully in just 1.5 hours thanks to its 100W input. The Powkey S99 claims it can hit 90% in 1 hour with a 100W charger, which I found to be accurate in my tests. The GENSROCK H120 is slower since it relies on its included AC adapter, and it doesn’t advertise a specific recharge time — expect closer to 3-4 hours for a full charge.
Which one has the longest battery lifespan?
The AFERIY Nano100 and Powkey S99 both use LiFePO4 battery cells rated for over 3,000 charge cycles while still retaining 80% capacity. That’s roughly 6 times longer than the GENSROCK H120, which uses standard lithium-ion cells rated for only about 1,500 cycles. If you plan to keep your power bank for years of daily use, go with the AFERIY or Powkey.
Can I charge my phone and laptop at the same time on these power banks?
Yes, all three can charge multiple devices simultaneously. The AFERIY Nano100 has a 100W USB-C port, a 45W USB-C port, and an 18W USB-A port for a total of 145W — plenty for a laptop and phone at full speed. The GENSROCK H120 wins on sheer port count with 8 ports, including 2 AC outlets, so you can charge a laptop, a drone, and a camera all at once. The Powkey S99 handles two devices fine but its total 100W output means multi-device charging is slower.
My Final Verdict
After testing all three back-to-back, my clear winner is the AFERIY Nano100. It combines the fastest 100W PD3.0 laptop charging with a lightweight 710-gram design and a LiFePO4 battery that lasts over 3,000 cycles — a combination the other two simply can’t match. The Powkey S99 is the runner-up for budget-conscious buyers who still want LiFePO4 safety, while the GENSROCK H120 is only worth considering if you absolutely need a 150W AC outlet.
If you’re on the fence, ask yourself this: do you carry your power bank daily or leave it in a bag? If you carry it, the AFERIY’s lighter weight and faster charging make it the obvious choice. If you mostly camp or need an AC plug, the GENSROCK has a unique trick the others lack.
Winner: AFERIY Nano100
- 【High-Capacity & Powerful Output】With a 99.2Wh/31000mAh capacity and...
- 【Advanced 6-in-1 Safety Protection】Equipped with a smart BMS (Battery...
- 【Long-Lasting & Safe LFP Battery】Features safer LiFePO4 cells—no...
This is for anyone who needs the fastest laptop charging in the lightest package. With a 100W PD3.0 port, 145W total output, and a LiFePO4 battery that lasts 3,000+ cycles, it’s the best all-around choice for remote workers, students, and travelers.
Runner-Up: Powkey S99
- 【100W Fast Charging With Multiple Ports】 This laptop portable charger...
- 【Portable charger With 96Wh Capacity】 With an ultra-large capacity of...
- 【Charge 4 Devices Simultaneously】 Included USB-C cable,makes it easy to...
This is for budget-minded buyers who still want LiFePO4 longevity. It has a 30,000mAh capacity and recharges to 90% in just 1 hour, but it’s heavier at 980 grams and capped at 100W total output.
Best for AC Outlet: GENSROCK H120
- Multi Output：This portable power bank has 8 output ports and 5 output...
- Easy To Carry : With a super slim size of 6.6 x 4 x 3 inches and a...
- Safety Protection System：Gensrock portable power station has a built-in...
This is for campers and emergency preppers who need a 150W peak AC outlet and 8 ports. It’s the most versatile but has the lowest 24,000mAh capacity and a standard lithium-ion battery rated for only 1,500 cycles.
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